Measure the outer diameter (OD) of your barb or nipple fitting. The tube's inner diameter (ID) should match or be 0.5–1 mm smaller than the barb OD for a snug, leak-free push fit. For example, a 6 mm barb pairs well with the 6 mm × 8 mm or 6 mm × 9 mm tube variant.

Yes. The tubing is made from food-grade silicone, which is odorless, tasteless, and non-toxic. It will not leach plasticizers or chemicals into the water, making it suitable for freshwater and marine aquarium air lines and water return lines.

Silicone is typically rated to +200 °C (+392 °F), which covers most automotive coolant overflow, vacuum, and breather line applications. It also remains flexible at low temperatures (down to approximately −60 °C), unlike rubber hoses that stiffen in cold climates.

Soft-durometer silicone resists kinking better than rigid PVC or nylon tubing. For very tight bends (bend radius smaller than the tube OD), use a hose support spring or elbow fitting to maintain bore integrity and consistent flow.

Silicone rubber has inherently good UV and ozone resistance compared to EPDM or standard PVC. The yellow pigment is blended into the silicone compound rather than surface-coated, so it will not peel or fade rapidly under normal outdoor exposure.

A sharp utility knife or scissors cuts silicone cleanly. For a square, burr-free end, score around the circumference first, then cut through in one motion. Avoid serrated blades, which can leave a ragged edge that reduces seal quality at the fitting.

This tubing is rated for low-pressure vacuum and air-line duty. For pressurized applications above approximately 0.3 MPa (about 43 psi), please contact us to confirm suitability, or consider a reinforced silicone hose with a braided inner layer.