Clear Silicone Tube — Food Grade Flexible Hose, 3mm / 5mm / 7mm ID

Measure the outer diameter (OD) of the fitting or barb you need to connect. The tube's inner diameter (ID) should match or be very slightly smaller than the fitting OD for a snug, leak-free seal. For example, a 5mm barb fitting typically pairs with 5×8mm tubing (5mm ID). Always verify both ID and OD before ordering. A quick reference: 3mm ID ≈ 1/8", 5mm ID ≈ 3/16", 7mm ID ≈ 9/32".

Silicone tubing of this type generally handles temperatures from approximately -60°C (-76°F) to +200°C (+392°F), making it suitable for both cold-water lines and moderate-heat applications such as engine coolant overflow or lab autoclaving. For sustained high-heat use above 180°C, please contact us to confirm the specific grade before ordering.

Yes. This tubing is made from food-grade silicone, which is non-toxic, odor-free, and tasteless. It is commonly used in homebrewing, aquariums, beverage dispensing, and other applications where contact with consumables is required. It does not leach plasticizers or chemicals under normal use conditions.

Silicone is generally more UV-resistant than standard rubber or PVC tubing, making it a reasonable choice for outdoor use. However, prolonged direct UV exposure over many years may cause gradual surface dulling. For permanent outdoor installations, consider adding UV-protective sleeving or conduit over the tubing.

Wall thickness is calculated as (OD − ID) ÷ 2. For 3×5mm tubing the wall is 1mm; for 5×8mm and 7×10mm it is 1.5mm. Thicker walls generally provide better pressure resistance, kink resistance, and durability under repeated flexing. The 1.5mm-wall sizes are a good choice for applications with moderate pressure or frequent movement.

Working pressure varies by size and wall thickness. For low-pressure fluid transfer — aquariums, homebrewing, lab peristaltic pumps, vacuum lines — these tubes are generally well-suited. For high-pressure pneumatic or hydraulic applications, please contact us to confirm suitability before ordering, as specific burst and working pressure ratings depend on the exact size and configuration.

Yes. The tubing ships as a continuous length (1M, 2M, 5M, 10M, 20M, 30M, or 50M) and can be cut cleanly with scissors or a sharp utility knife. A straight, square cut ensures the best contact surface against fittings and clamps. There is no minimum cut length — order the roll size closest to your total project requirement.

Silicone tubing is generally preferred over PVC for aquarium use because it does not leach plasticizers into the water, stays flexible at low temperatures, and does not yellow or become brittle over time. Compared to latex, silicone is odor-free and more resistant to algae buildup on the inner wall. It is a common choice for both freshwater and saltwater aquarium air and water lines.