{"product_id":"brass-round-tube-025mm-wall-od-1-125mm-300mm","title":"Brass Round Tube 0.25mm Wall Thickness — OD 1mm to 12.5mm, 300mm Length","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 OD and length for my project?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Start with the inner diameter (ID) your application requires, then add the wall thickness to get the OD. For example, if you need a 3mm bore, choose the 3.5mm OD × 3mm ID variant (0.25mm wall each side). All tubes in this listing are 300mm (≈11.8\\u2033) long — cut to length with a fine-tooth saw or tube cutter.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What load or pressure can these brass tubes handle?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These are thin-wall decorative and precision-fit tubes (0.25mm wall). They are generally suitable for light structural, model-making, and instrument applications. For high-pressure fluid lines or heavy structural loads, a thicker-wall tube is recommended.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these tubes suitable for outdoor or humid environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass offers naturally good corrosion resistance compared to mild steel and is typically suitable for indoor humid environments and light outdoor use. For prolonged saltwater or harsh outdoor exposure, consider applying a clear lacquer or sealant coating.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What thread or fitting standards are compatible with these tubes?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These are unthreaded round tubes. OD dimensions follow metric sizing (1mm–12.5mm), making them compatible with standard metric fittings, collets, and bushings. For imperial fittings, please verify the OD in inches using the conversion: 1mm ≈ 0.0394\\u2033.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I solder or braze these brass tubes?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Brass is generally easy to solder with standard rosin-core or acid-core solder and a suitable flux. It is also brazeable. Clean the surface with fine sandpaper or flux before joining for best results.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I cut these tubes cleanly without deforming them?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For the smallest diameters (1mm–3mm), a sharp hobby knife or fine-tooth jeweler's saw works well. For larger sizes (4mm and up), a mini tube cutter or a miter saw with a non-ferrous blade typically produces the cleanest, burr-free cut. Always support the tube to prevent oval deformation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can these tubes be used as telescope sleeves or nesting tubes?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — because each size steps up by approximately 0.5mm in OD and the wall is a consistent 0.25mm, adjacent sizes in this range are generally designed to telescope or nest inside one another with a close sliding fit. For example, the 2mm OD tube typically slides inside the 2.5mm OD tube.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eBrass Round Tube 0.25mm Wall — Precision Thin-Wall Tubing for Models, Instruments \u0026amp; DIY\u003c\/h2\u003e\n    \u003cp\u003eWhether you're building a scale model, repairing a musical instrument, fabricating a custom jig, or routing a small fluid line, finding a brass round tube in exactly the right diameter is often the hardest part. Oversized tubes waste material; undersized ones won't fit. This listing solves that problem with 22 carefully stepped metric sizes — all sharing a consistent 0.25mm wall thickness — so you can pick the exact OD-to-ID ratio your project demands.\u003c\/p\u003e\n    \u003cp\u003eEach tube is made from brass (copper-zinc alloy) and measures \u003cstrong\u003e300mm (≈11.8″) in length\u003c\/strong\u003e. Outside diameters range from \u003cstrong\u003e1mm (≈0.039″) to 12.5mm (≈0.492″)\u003c\/strong\u003e, with inside diameters stepping accordingly (e.g., 1mm OD × 0.5mm ID, 6mm OD × 5.5mm ID, 12.5mm OD × 12mm ID). Wall thickness is a uniform \u003cstrong\u003e0.25mm\u003c\/strong\u003e throughout the range. Tubes are sold individually — select your size from the variant dropdown above.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include \u003cstrong\u003escale model brass tubing for railway and aircraft builds\u003c\/strong\u003e, \u003cstrong\u003etelescope sleeve assemblies\u003c\/strong\u003e where adjacent sizes nest inside one another, \u003cstrong\u003esmall instrument repair\u003c\/strong\u003e (flute, clarinet, and brass instrument keywork), custom pen-making mandrels, and light-duty fluid or air routing in hobby CNC and pneumatic setups.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003eℹ️\u003c\/span\u003e\n    \u003cstrong\u003eMetric sizing:\u003c\/strong\u003e All OD and ID dimensions are in millimeters. Adjacent sizes in this range are generally designed to telescope — the ID of one size closely matches the OD of the next smaller size. Verify your required bore before ordering.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These Brass Round Tubes\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e22 Stepped Metric Sizes\u003c\/strong\u003e — OD from 1mm to 12.5mm in fine increments, giving you precise control over wall clearance for \u003cstrong\u003etelescope sleeve and nesting tube\u003c\/strong\u003e assemblies.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eConsistent 0.25mm Wall\u003c\/strong\u003e — Uniform thin wall across all sizes ensures predictable fit and weight, critical for \u003cstrong\u003escale model brass tubing\u003c\/strong\u003e and instrument keywork repairs.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✂️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eEasy to Cut and Machine\u003c\/strong\u003e — Brass machines cleanly with standard hobby tools; cuts without burring when supported, and accepts soldering, brazing, and light threading.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eNatural Corrosion Resistance\u003c\/strong\u003e — Brass resists oxidation in typical indoor and light outdoor environments, making it a reliable choice for \u003cstrong\u003esmall-diameter brass pipe for hobby and craft\u003c\/strong\u003e projects that need longevity.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔗\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSolderable and Brazeable\u003c\/strong\u003e — Joins readily with rosin-core solder and standard flux, enabling clean, strong connections for \u003cstrong\u003ecustom brass tube fittings\u003c\/strong\u003e and structural assemblies.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e300mm Ready-to-Use Length\u003c\/strong\u003e — At 300mm (≈11.8″), each tube provides enough material for most hobby and instrument applications with room to cut to final length on-site.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — Brass Round Tube\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eBrass (copper-zinc alloy)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWall Thickness\u003c\/th\u003e\n\u003ctd\u003e0.25mm (uniform across all sizes)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOutside Diameter (OD) Range\u003c\/th\u003e\n\u003ctd\u003e1mm (≈0.039″) — 12.5mm (≈0.492″)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInside Diameter (ID) Range\u003c\/th\u003e\n\u003ctd\u003e0.5mm — 12mm (OD minus 0.5mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003ctd\u003e300mm (≈11.8″)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Sizes (OD × ID)\u003c\/th\u003e\n\u003ctd\u003e1×0.5, 1.2×0.7, 1.5×1, 1.8×1.3, 2×1.5, 2.5×2, 3×2.5, 3.5×3, 4×3.5, 4.5×4, 5×4.5, 5.5×5, 6×5.5, 6.5×6, 7×6.5, 8×7.5, 8.5×8, 9.5×9, 10×9.5, 10.5×10, 12×11.5, 12.5×12 (all in mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTube Form\u003c\/th\u003e\n\u003ctd\u003eRound, seamless-appearance hollow tube\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 tube per variant selected\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCountry of Manufacture\u003c\/th\u003e\n\u003ctd\u003eChina\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\u003eConfirm your size before ordering.\u003c\/strong\u003e Due to the close stepping between sizes, please double-check both OD and ID against your project requirements. If you need a size not listed, contact us to confirm availability.\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 OD and length for my project?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eStart with the inner diameter (ID) your application requires, then add the wall thickness to get the OD. For example, if you need a 3mm bore, choose the \u003cstrong\u003e3.5mm OD × 3mm ID\u003c\/strong\u003e variant (0.25mm wall each side). All tubes in this listing are \u003cstrong\u003e300mm (≈11.8″) long\u003c\/strong\u003e — cut to length with a fine-tooth saw or tube cutter as needed.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat load or pressure can these brass tubes handle?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThese are thin-wall decorative and precision-fit tubes (0.25mm wall). They are generally suitable for light structural, model-making, and instrument applications. For high-pressure fluid lines or heavy structural loads, a thicker-wall tube is recommended. Contact us to confirm suitability for your specific application.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these tubes suitable for outdoor or humid environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eBrass offers naturally good corrosion resistance compared to mild steel and is typically suitable for indoor humid environments and light outdoor use. For prolonged saltwater or harsh outdoor exposure, consider applying a clear lacquer or sealant coating to extend service life.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat thread or fitting standards are compatible with these tubes?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThese are \u003cstrong\u003eunthreaded round tubes\u003c\/strong\u003e. OD dimensions follow metric sizing (1mm–12.5mm), making them compatible with standard metric fittings, collets, and bushings. For imperial fittings, verify the OD in inches: 1mm ≈ 0.0394″. For example, the 6mm OD tube is approximately 0.236″.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I solder or braze these brass tubes?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. Brass is generally easy to solder with standard rosin-core or acid-core solder and a suitable flux. It is also brazeable with silver brazing alloy. Clean the surface with fine sandpaper or apply flux before joining for best adhesion and a clean fillet.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I cut these tubes cleanly without deforming them?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eFor the smallest diameters (1mm–3mm), a sharp hobby knife or fine-tooth jeweler's saw works well. For larger sizes (4mm and up), a mini tube cutter or a miter saw with a non-ferrous blade typically produces the cleanest, burr-free cut. Always support the tube along its length to prevent oval deformation during cutting.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan these tubes be used as telescope sleeves or nesting tubes?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes — because each size steps up by approximately 0.5mm in OD and the wall is a consistent 0.25mm, adjacent sizes in this range are generally designed to telescope or nest inside one another with a close sliding fit. For example, the \u003cstrong\u003e2mm OD tube\u003c\/strong\u003e typically slides inside the \u003cstrong\u003e2.5mm OD tube\u003c\/strong\u003e. This makes the set ideal for \u003cstrong\u003emulti-stage telescope sleeve assemblies\u003c\/strong\u003e in model and instrument work.\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 \u003cstrong\u003esize (OD × ID)\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"1mm x 0.5mm \/ 0.25mm \/ 300mm","offer_id":52332695421202,"sku":"AdaahDZ34019x1","price":7.56,"currency_code":"USD","in_stock":true},{"title":"1.2mm x 0.7mm \/ 0.25mm \/ 300mm","offer_id":52332695453970,"sku":"AdaahDZ34022x1","price":7.56,"currency_code":"USD","in_stock":true},{"title":"1.5mm x 1mm \/ 0.25mm \/ 300mm","offer_id":52332695486738,"sku":"AdaahDZ34028x1","price":7.56,"currency_code":"USD","in_stock":true},{"title":"1.8mm x 1.3mm \/ 0.25mm \/ 300mm","offer_id":52332695519506,"sku":"AdaahDZ34035x1","price":7.56,"currency_code":"USD","in_stock":true},{"title":"2mm x 1.5mm \/ 0.25mm \/ 300mm","offer_id":52332695552274,"sku":"AdaahDZ34040x1","price":7.04,"currency_code":"USD","in_stock":true},{"title":"2.5mm x 2mm \/ 0.25mm \/ 300mm","offer_id":52332695585042,"sku":"AdaahDZ34047x1","price":7.56,"currency_code":"USD","in_stock":true},{"title":"3mm x 2.5mm \/ 0.25mm \/ 300mm","offer_id":52332695617810,"sku":"AdaahDZ34052x1","price":7.04,"currency_code":"USD","in_stock":true},{"title":"3.5mm x 3mm \/ 0.25mm \/ 300mm","offer_id":52332695650578,"sku":"AdaahDZ34060x1","price":7.56,"currency_code":"USD","in_stock":true},{"title":"4mm x 3.5mm \/ 0.25mm \/ 300mm","offer_id":52332695683346,"sku":"AdaahDZ34066x1","price":7.85,"currency_code":"USD","in_stock":true},{"title":"4.5mm x 4mm \/ 0.25mm \/ 300mm","offer_id":52332695716114,"sku":"AdaahDZ34073x1","price":7.93,"currency_code":"USD","in_stock":true},{"title":"5mm x 4.5mm \/ 0.25mm \/ 300mm","offer_id":52332695748882,"sku":"AdaahDZ34078x1","price":8.15,"currency_code":"USD","in_stock":true},{"title":"5.5mm x 5mm \/ 0.25mm \/ 300mm","offer_id":52332695781650,"sku":"AdaahDZ34086x1","price":8.98,"currency_code":"USD","in_stock":true},{"title":"6mm x 5.5mm \/ 0.25mm \/ 300mm","offer_id":52332695814418,"sku":"AdaahDZ34091x1","price":9.29,"currency_code":"USD","in_stock":true},{"title":"6.5mm x 6mm \/ 0.25mm \/ 300mm","offer_id":52332695847186,"sku":"AdaahDZ34100x1","price":9.55,"currency_code":"USD","in_stock":true},{"title":"7mm x 6.5mm \/ 0.25mm \/ 300mm","offer_id":52332695879954,"sku":"AdaahDZ34104x1","price":9.76,"currency_code":"USD","in_stock":true},{"title":"8mm x 7.5mm \/ 0.25mm \/ 300mm","offer_id":52332695912722,"sku":"AdaahDZ34114x1","price":12.34,"currency_code":"USD","in_stock":true},{"title":"8.5mm x 8mm \/ 0.25mm \/ 300mm","offer_id":52332695945490,"sku":"AdaahDZ34123x1","price":12.66,"currency_code":"USD","in_stock":true},{"title":"9.5mm x 9mm \/ 0.25mm \/ 300mm","offer_id":52332695978258,"sku":"AdaahDZ34134x1","price":13.23,"currency_code":"USD","in_stock":true},{"title":"10mm x 9.5mm \/ 0.25mm \/ 300mm","offer_id":52332696011026,"sku":"AdaahDZ34138x1","price":13.55,"currency_code":"USD","in_stock":true},{"title":"10.5mm x 10mm \/ 0.25mm \/ 300mm","offer_id":52332696043794,"sku":"AdaahDZ34148x1","price":14.43,"currency_code":"USD","in_stock":true},{"title":"12mm x 11.5mm \/ 0.25mm \/ 300mm","offer_id":52332696076562,"sku":"AdaahDZ34159x1","price":15.29,"currency_code":"USD","in_stock":true},{"title":"12.5mm x 12mm \/ 0.25mm \/ 300mm","offer_id":52332696109330,"sku":"AdaahDZ34168x1","price":15.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture11of11_cdb34f06-f98a-4f57-bd8e-a25a54d67379.jpg?v=1781101097","url":"https:\/\/homediyer.com\/de\/products\/brass-round-tube-025mm-wall-od-1-125mm-300mm","provider":"HomeDIYer","version":"1.0","type":"link"}