{"product_id":"7mm-heat-shrink-tubing-2-1-ratio-assorted-colors","title":"7mm Heat Shrink Tubing – 2:1 Ratio, Assorted Colors, 1–10 Meter Lengths","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right length of heat shrink tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure the total length of wire or splice you need to cover, then add at least 10–15% extra for overlap and trimming. For example, if you need to cover 90cm (≈35.4\\u201d) of wiring, a 1 Metre length is typically sufficient. For larger wiring harness projects, the 5 Metre or 10 Metre options generally offer better value.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does 2:1 shrink ratio mean?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A 2:1 shrink ratio means the tubing will shrink to approximately half its original inner diameter when heat is applied. This 7mm tubing will typically shrink down to around 3.5mm, creating a snug, protective sleeve around the wire or connector.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What wire sizes does 7mm heat shrink tubing fit?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"7mm inner diameter tubing generally fits wire bundles or individual conductors with an outer diameter up to approximately 6.5mm before shrinking. This typically covers wire gauges in the range of AWG 8–14, though the exact fit depends on insulation thickness. Always measure your wire's outer diameter before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this heat shrink tubing be used outdoors or in automotive applications?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Polyolefin heat shrink tubing is generally resistant to moisture, UV exposure, and common automotive fluids, making it suitable for outdoor wiring, engine bay repairs, trailer wiring, and marine applications. For extreme chemical exposure environments, confirm compatibility with your specific fluids before use.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What tool do I use to shrink the tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A heat gun is the recommended tool for even, controlled shrinking. In a pinch, a lighter or match can work for small sections, but a heat gun provides more consistent results and reduces the risk of scorching. Most polyolefin tubing begins to shrink at around 90°C (194°F) and fully recovers by approximately 120°C (248°F).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why are there different colors available?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Color-coding is a standard practice in electrical work to identify circuits, polarity, or wire function at a glance. For example, red is commonly used for positive leads, black for ground, and other colors for signal or auxiliary circuits. Having multiple colors in one order simplifies wiring harness organization.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this tubing RoHS compliant and safe for use in electronics?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Polyolefin heat shrink tubing is generally manufactured to meet RoHS guidelines, meaning it is free from restricted hazardous substances. It is widely used in consumer electronics, automotive wiring, and DIY electrical projects. If your application requires a specific certification, please contact us to confirm.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e7mm Heat Shrink Tubing — Reliable Wire Protection in 7 Colors \u0026amp; 4 Lengths\u003c\/h2\u003e\n    \u003cp\u003eWhether you're rewiring a car stereo, repairing trailer lights, or organizing a home electrical panel, exposed wire splices and bare connectors are a constant hazard. Moisture, vibration, and abrasion can degrade connections over time — leading to shorts, corrosion, and failed circuits. This 7mm heat shrink tubing gives DIYers, hobbyists, and automotive technicians a fast, clean way to seal and protect wire joints without tape that unravels or connectors that corrode.\u003c\/p\u003e\n    \u003cp\u003eEach order is a single continuous length of polyolefin heat shrink tubing with a 7mm (≈9\/32\") inner diameter before shrinking and a 2:1 shrink ratio — meaning it shrinks down to approximately 3.5mm (≈9\/64\") when heat is applied. Available in lengths of 1 Metre (≈3.3 ft), 2 Metre (≈6.6 ft), 5 Metre (≈16.4 ft), and 10 Metre (≈32.8 ft), and in seven colors: Black, White, Red, Green, Yellow, Blue, and Transparent.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include automotive wiring harness repair, marine and trailer wiring protection, color-coded circuit identification in home electrical projects, and strain relief on DIY electronics builds. The transparent option is especially useful when you need to inspect the connection underneath without removing the sleeve.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e🔌\u003c\/span\u003e\n    \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits wire bundles and conductors with an outer diameter up to approximately 6.5mm. Suitable for AWG 8–14 wire gauges (varies by insulation thickness). Works with standard heat guns, and is compatible with automotive, marine, and general electrical wiring applications.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 7mm Heat Shrink Tubing Sleeves\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔥\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e2:1 Shrink Ratio\u003c\/strong\u003e — Shrinks from 7mm down to approximately 3.5mm for a firm, form-fitting seal around wire splices and connectors, eliminating gaps that allow moisture ingress.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e7 Color Options\u003c\/strong\u003e — Black, White, Red, Green, Yellow, Blue, and Transparent allow color-coded wire identification across automotive, marine, and DIY electrical wiring projects.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlexible Length Selection\u003c\/strong\u003e — Choose from 1m, 2m, 5m, or 10m to match your project scale, from a single splice repair to a full wiring harness installation.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMoisture \u0026amp; Abrasion Resistance\u003c\/strong\u003e — Polyolefin construction provides a protective barrier against water, road grime, and mechanical wear — extending the service life of wire connections in harsh environments.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e👁️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eTransparent Option Available\u003c\/strong\u003e — The clear variant lets you visually inspect the underlying connection or label without cutting the sleeve — useful for quality control in electronics assembly.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBroad Application Range\u003c\/strong\u003e — Suitable for car electrical repair, trailer wiring, marine wiring protection, RC hobby builds, and general cable wire wrap tasks where a clean, durable finish is needed.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — 7mm Polyolefin Heat Shrink Tubing\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003e7mm (≈9\/32\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eApproximately 3.5mm (≈9\/64\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShrink Ratio\u003c\/th\u003e\n\u003ctd\u003e2:1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePolyolefin\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Colors\u003c\/th\u003e\n\u003ctd\u003eBlack, White, Red, Green, Yellow, Blue, Transparent\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e1m (≈3.3 ft), 2m (≈6.6 ft), 5m (≈16.4 ft), 10m (≈32.8 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShrink Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically begins at ~90°C (194°F); full recovery at ~120°C (248°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompatible Wire Gauges\u003c\/th\u003e\n\u003ctd\u003eGenerally AWG 8–14 (varies by insulation OD; measure before ordering)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eRecommended Application Tool\u003c\/th\u003e\n\u003ctd\u003eHeat gun (lighter suitable for small sections)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eAutomotive wiring, marine wiring, trailer wiring, electronics, DIY electrical\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWall Thickness (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ Contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOperating Temperature Range\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm for your specific application\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-note\"\u003e\n    \u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e\n    \u003cstrong\u003eBefore ordering:\u003c\/strong\u003e Measure the outer diameter of your wire or bundle to confirm fit. The 7mm inner diameter accommodates conductors up to approximately 6.5mm OD. If you need a different diameter, please browse our other heat shrink tubing sizes.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-faq\"\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right length of heat shrink tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eMeasure the total length of wire or splice you need to cover, then add at least 10–15% extra for overlap and trimming. For example, if you need to cover 90cm (≈35.4\") of wiring, a 1 Metre length is typically sufficient. For larger wiring harness projects, the 5 Metre or 10 Metre options generally offer better value per meter.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat does 2:1 shrink ratio mean?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eA 2:1 shrink ratio means the tubing will shrink to approximately half its original inner diameter when heat is applied. This 7mm tubing will typically shrink down to around 3.5mm (≈9\/64\"), creating a snug, protective sleeve around the wire or connector.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat wire sizes does 7mm heat shrink tubing fit?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003e7mm inner diameter tubing generally fits wire bundles or individual conductors with an outer diameter up to approximately 6.5mm before shrinking. This typically covers wire gauges in the range of AWG 8–14, though the exact fit depends on insulation thickness. Always measure your wire's outer diameter before ordering.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan this heat shrink tubing be used outdoors or in automotive applications?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. Polyolefin heat shrink tubing is generally resistant to moisture, UV exposure, and common automotive fluids, making it suitable for outdoor wiring, engine bay repairs, trailer wiring, and marine applications. For extreme chemical exposure environments, confirm compatibility with your specific fluids before use.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat tool do I use to shrink the tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eA heat gun is the recommended tool for even, controlled shrinking. In a pinch, a lighter or match can work for small sections, but a heat gun provides more consistent results and reduces the risk of scorching. Most polyolefin tubing begins to shrink at around 90°C (194°F) and fully recovers by approximately 120°C (248°F).\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhy are there different colors available?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eColor-coding is a standard practice in electrical work to identify circuits, polarity, or wire function at a glance. For example, red is commonly used for positive leads, black for ground, and other colors for signal or auxiliary circuits. Having multiple colors in one order simplifies wiring harness organization and troubleshooting.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this tubing RoHS compliant and safe for use in electronics?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003ePolyolefin heat shrink tubing is generally manufactured to meet RoHS guidelines, meaning it is free from restricted hazardous substances. It is widely used in consumer electronics, automotive wiring, and DIY electrical projects. If your application requires a specific certification, please contact us to confirm.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your color and length above, then add to cart — ships from our US warehouse.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Black \/ φ7mm \/ 1 Metre","offer_id":52331127865618,"sku":"GYWXWGLBZSJ000093x1","price":1.35,"currency_code":"USD","in_stock":true},{"title":"White \/ φ7mm \/ 1 Metre","offer_id":52331127898386,"sku":"GYWXWGLBZSJ000094x1","price":1.78,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ7mm \/ 1 Metre","offer_id":52331127931154,"sku":"GYWXWGLBZSJ000095x1","price":1.78,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ7mm \/ 1 Metre","offer_id":52331127963922,"sku":"GYWXWGLBZSJ000096x1","price":1.78,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ7mm \/ 1 Metre","offer_id":52331127996690,"sku":"GYWXWGLBZSJ000097x1","price":1.78,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ7mm \/ 1 Metre","offer_id":52331128029458,"sku":"GYWXWGLBZSJ000098x1","price":1.78,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ7mm \/ 1 Metre","offer_id":52331128062226,"sku":"GYWXWGLBZSJ000099x1","price":1.78,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ7mm \/ 2 Metre","offer_id":52331128094994,"sku":"GYWXWGLBZSJ000093x2","price":1.9,"currency_code":"USD","in_stock":true},{"title":"White \/ φ7mm \/ 2 Metre","offer_id":52331128127762,"sku":"GYWXWGLBZSJ000094x2","price":1.96,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ7mm \/ 2 Metre","offer_id":52331128160530,"sku":"GYWXWGLBZSJ000095x2","price":1.96,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ7mm \/ 2 Metre","offer_id":52331128193298,"sku":"GYWXWGLBZSJ000096x2","price":1.96,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ7mm \/ 2 Metre","offer_id":52331128226066,"sku":"GYWXWGLBZSJ000097x2","price":1.96,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ7mm \/ 2 Metre","offer_id":52331128258834,"sku":"GYWXWGLBZSJ000098x2","price":1.96,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ7mm \/ 2 Metre","offer_id":52331128291602,"sku":"GYWXWGLBZSJ000099x2","price":1.96,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ7mm \/ 5 Metre","offer_id":52331128324370,"sku":"GYWXWGLBZSJ000093x5","price":3.21,"currency_code":"USD","in_stock":true},{"title":"White \/ φ7mm \/ 5 Metre","offer_id":52331128357138,"sku":"GYWXWGLBZSJ000094x5","price":3.36,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ7mm \/ 5 Metre","offer_id":52331128389906,"sku":"GYWXWGLBZSJ000095x5","price":3.36,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ7mm \/ 5 Metre","offer_id":52331128422674,"sku":"GYWXWGLBZSJ000096x5","price":3.36,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ7mm \/ 5 Metre","offer_id":52331128455442,"sku":"GYWXWGLBZSJ000097x5","price":3.36,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ7mm \/ 5 Metre","offer_id":52331128488210,"sku":"GYWXWGLBZSJ000098x5","price":3.36,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ7mm \/ 5 Metre","offer_id":52331128520978,"sku":"GYWXWGLBZSJ000099x5","price":3.36,"currency_code":"USD","in_stock":true},{"title":"Black \/ φ7mm \/ 10 Metre","offer_id":52331128553746,"sku":"GYWXWGLBZSJ000093x10","price":5.7,"currency_code":"USD","in_stock":true},{"title":"White \/ φ7mm \/ 10 Metre","offer_id":52331128586514,"sku":"GYWXWGLBZSJ000094x10","price":5.98,"currency_code":"USD","in_stock":true},{"title":"Red \/ φ7mm \/ 10 Metre","offer_id":52331128619282,"sku":"GYWXWGLBZSJ000095x10","price":5.98,"currency_code":"USD","in_stock":true},{"title":"Green \/ φ7mm \/ 10 Metre","offer_id":52331128652050,"sku":"GYWXWGLBZSJ000096x10","price":5.98,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ φ7mm \/ 10 Metre","offer_id":52331128684818,"sku":"GYWXWGLBZSJ000097x10","price":5.98,"currency_code":"USD","in_stock":true},{"title":"Blue \/ φ7mm \/ 10 Metre","offer_id":52331128717586,"sku":"GYWXWGLBZSJ000098x10","price":5.98,"currency_code":"USD","in_stock":true},{"title":"Transparent \/ φ7mm \/ 10 Metre","offer_id":52331128750354,"sku":"GYWXWGLBZSJ000099x10","price":5.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of12_6dd05e71-45dd-47b8-ace1-353ade28401b.jpg?v=1780994916","url":"https:\/\/homediyer.com\/products\/7mm-heat-shrink-tubing-2-1-ratio-assorted-colors","provider":"HomeDIYer","version":"1.0","type":"link"}