What is the wall thickness of these tubes?

Wall thickness varies by size variant. For example, the 1mm ID × 2mm OD variant has a 0.5mm wall, and the 3mm ID × 5mm OD variant has a 1mm wall. See the variant options on this page for the exact ID and OD of each size, then calculate wall thickness as (OD − ID) ÷ 2.

How do I cut the tube to length?

A sharp utility knife, scissors, or a tube cutter designed for soft tubing works well. For clean, square cuts on very small diameters (under 1mm ID), a razor blade or scalpel is recommended. Each order ships as a continuous 10-meter roll.

Black Food Grade Silicone Capillary Tube — ID 0.3mm to 4mm, Soft Rubber Hose, 10 Meter

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Black Food Grade Silicone Capillary Tube — ID 0.3mm to 4mm, Soft Rubber Hose, 10 Meter

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By HomeDIYer®

ID x OD: 0.3mm x 0.8mm

Length (Meter): 10 Meter

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$3.88 USD

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In stock (500 units), ready to be shipped

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Black Food Grade Silicone Capillary Tube — Precision Micro Hose for Lab, Brewing & Aquarium Use

When your project demands a flexible, chemically inert micro hose that won't contaminate what flows through it, standard PVC or rubber tubing falls short. DIYers, lab technicians, home brewers, and aquarium hobbyists working with ultra-small bore lines need a black food grade silicone capillary tube that holds its shape under heat, stays pliable in the cold, and seals reliably on barb fittings without clamps.

Each order includes one continuous 10-meter (≈32.8 ft) roll of black silicone tubing. Sizes range from 0.3mm ID × 0.8mm OD up to 4mm (≈5/32") ID × 6mm (≈15/64") OD, with 28 distinct ID × OD combinations available. Wall thickness varies by variant and can be calculated as (OD − ID) ÷ 2. All variants are sold per 10-meter roll.

Typical applications include aquarium CO₂ diffuser lines and micro-dosing tubing, home brewing and winemaking transfer hoses, laboratory peristaltic pump tubing, medical device prototyping, and precision fluid routing in electronics cooling rigs. The small bore dimensions make this silicone rubber capillary hose ideal wherever standard 1/4" tubing is simply too large.

✅ Compatibility: Fits standard barb fittings matching the listed ID. Works with peristaltic pumps, CO₂ regulators, syringe tips, and micro-nozzles. Confirm your fitting OD matches the tube ID before ordering.

✅ Key Features of These Black Food Grade Silicone Capillary Tubes

🧪Food Grade Silicone Material — Made from non-toxic, odorless silicone that meets food contact standards, making it safe for home brewing transfer lines, winemaking hoses, and beverage dispensing without leaching plasticizers.
📏28 Precision Size Variants — ID options from 0.3mm to 4mm paired with matching OD dimensions give you an exact fit for micro-bore applications where off-the-shelf tubing is too large or too stiff.
🌡️Wide Temperature Tolerance — Remains flexible from approximately -60°C (-76°F) to +200°C (+392°F), suitable for aquarium CO₂ lines in cold rooms and steam-adjacent brewing setups alike.
🔄Flexible & Kink-Resistant — Soft silicone rubber construction allows tight routing around corners without collapsing the bore, keeping fluid flow consistent in compact builds and lab rigs.
☀️UV & Ozone Resistant — Silicone holds up better than PVC or standard rubber in UV-exposed or ozone-rich environments, extending service life in outdoor aquaponics systems and greenhouse irrigation lines.
📦10-Meter Continuous Roll — Each roll ships as a single uncut length, letting you cut exactly what you need for peristaltic pump tubing, capillary dosing lines, or multi-run aquarium CO₂ distribution without waste.

📐 Technical Specifications — Silicone Capillary Tube Hose

Material	Food grade silicone rubber
Color	Black
Inner Diameter (ID) Range	0.3mm – 4mm (≈0.012" – 0.157")
Outer Diameter (OD) Range	0.8mm – 6mm (≈0.031" – 0.236")
Length per Roll	10 Meter (≈32.8 ft)
Wall Thickness	See variant options — calculated as (OD − ID) ÷ 2
Temperature Range	Typically -60°C to +200°C (-76°F to +392°F)
Pressure Rating	Contact us to confirm for your specific size
Flexibility	Soft, flexible; kink-resistant at rated bend radii
Chemical Resistance	Resistant to water, dilute acids, alcohols, and ozone
UV Resistance	Generally suitable for outdoor use
Sold As	1 roll (10 meters, continuous, uncut)
Country of Origin	China

⚠️ Size Note: Each variant lists ID × OD. Wall thickness = (OD − ID) ÷ 2. If you need a specific wall thickness or pressure rating, contact us before ordering to confirm suitability.

❓ Frequently Asked Questions

How do I choose the right inner diameter (ID) for my application?

Match the ID to the outer diameter of the fitting, nozzle, or tube it will connect to. Silicone stretches, so sizing down slightly gives a snug, leak-resistant seal. Common conversions: 1mm ≈ 3/64", 2mm ≈ 5/64", 3mm ≈ 1/8", 4mm ≈ 5/32". When in doubt, order one size smaller than your fitting OD.

What temperature range can this silicone tube handle?

Food grade silicone tubing typically withstands approximately -60°C (-76°F) to +200°C (+392°F). This makes it suitable for cold-room aquarium CO₂ lines, home brewing transfer hoses near heat sources, and laboratory applications. Always verify your specific operating conditions.

Is this tube safe for food and beverage contact?

Yes. This tubing is made from food grade silicone, which is generally non-toxic, odorless, and tasteless. It is commonly used in home brewing, winemaking, aquarium CO₂ systems, and laboratory fluid transfer. Unlike PVC tubing, it does not leach plasticizers into the fluid.

Can I use this silicone hose outdoors or in UV-exposed environments?

Silicone is generally more UV and ozone resistant than standard rubber or PVC. For prolonged outdoor exposure — such as aquaponics systems or greenhouse irrigation lines — it typically holds up well. Shielding from direct sunlight will further extend service life.

What is the wall thickness of each size variant?

Wall thickness varies by variant and is calculated as (OD − ID) ÷ 2. For example: 1mm ID × 2mm OD = 0.5mm wall; 2mm ID × 4mm OD = 1mm wall; 3mm ID × 5mm OD = 1mm wall. Check the variant selector for your exact ID and OD, then apply the formula.

How much pressure can this capillary silicone tube handle?

Thin-wall micro silicone tubing in this size range is generally suited for low-pressure fluid transfer — typically under 30 PSI for most variants. Thicker-wall sizes (e.g., 3mm ID × 6mm OD) can generally handle more. For pressure-critical applications, contact us to confirm suitability for your specific variant.

Will this tube work with standard barb fittings?

Yes. Silicone is flexible and stretches to fit over barbed fittings. Choose an ID that matches or is slightly smaller than the barb OD for a secure, leak-resistant connection. No clamps are typically needed for low-pressure aquarium CO₂ or brewing applications.

How do I cut the tube to the length I need?

Each order ships as a continuous 10-meter roll. A sharp utility knife, scissors, or a soft-tube cutter works well for most sizes. For very small diameters (under 1mm ID), a razor blade or scalpel gives the cleanest, squarest cut. Score and cut in one smooth motion to avoid crushing the bore.

🛒 Select your ID × OD size above, then add to cart — ships from our US warehouse.

Black Food Grade Silicone Capillary Tube — ID 0.3mm to 4mm, Soft Rubber Hose, 10 Meter

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Description

Black Food Grade Silicone Capillary Tube — Precision Micro Hose for Lab, Brewing & Aquarium Use

✅ Key Features of These Black Food Grade Silicone Capillary Tubes

📐 Technical Specifications — Silicone Capillary Tube Hose

❓ Frequently Asked Questions

Black Food Grade Silicone Capillary Tube — ID 0.3mm to 4mm, Soft Rubber Hose, 10 Meter

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