Black Silicone Tube Hose Pipe Food Grade Soft Rubber Flexible Tubing 0.3mm-38mm

Measure the outer diameter of the barb or nipple the tube will slide onto. For a snug, leak-resistant seal, choose a silicone tube whose inner diameter (ID) is 0.5 mm–1 mm smaller than the barb OD — the silicone will stretch slightly and grip the fitting. If you need a looser slip fit, match the ID to the barb OD exactly.

Yes. The tubing is made from food-grade silicone rubber, which is odorless, tasteless, and non-toxic. It is commonly used in home brewing, beverage dispensing, and aquarium water lines. It does not impart flavors or leach plasticizers the way standard PVC tubing can.

Silicone rubber typically withstands continuous use up to approximately 200 °C (392 °F) and short-term peaks slightly above that. It also remains flexible at low temperatures down to around −60 °C (−76 °F). Avoid prolonged contact with concentrated acids, ketones, or chlorinated solvents, which can degrade silicone over time.

Variants labeled "Flat-shaped" (25 mm × 31 mm OD and above) have a flattened oval cross-section when the tube is at rest with no internal pressure. Once fluid or air pressure is applied, the bore opens to its rated diameter. Confirm that your fitting or clamp can accommodate a flattened profile during installation before the line is pressurized.

Yes. Silicone is a popular choice for aquarium air lines because it is non-toxic, flexible, and does not harden or crack over time the way PVC airline tubing can. For CO₂ systems, note that silicone is slightly gas-permeable, so very long runs may experience minor CO₂ diffusion. For short runs (under 1 m), this is rarely a practical concern.

Silicone outperforms PVC in temperature range (PVC softens above ~60 °C), UV resistance, and long-term flexibility — PVC and latex can stiffen or crack after months of use. Silicone is also odor-free and food-safe. The trade-off is that silicone is softer and may not hold pressure as well as reinforced PVC hose in high-pressure applications above ~0.3 MPa (43 psi). For low-to-medium pressure fluid transfer and air lines, silicone is the more durable long-term choice.

No special tools are required. Cut the tube to length with sharp scissors or a utility knife for a clean, square end. Push the tube onto a barbed fitting — lightly wetting the barb with water makes insertion easier. For a more secure connection under pressure, use a hose clamp sized to the OD of the tube. No adhesive or primer is needed for standard barbed connections.