Features 【Material】The shell material of this air stop valve is ABS resin, and the film material uses silicon rubber, safe and nontoxic; 【Durable】Strong resistance to acid, alkali, salt corrosion ability; heat resistant and has good formability, lightweight, easy to install. 【Good Performance】Opening pressure: ≤0.5 Kpa, Maximum back pressure: ≥0.3 Mpa. Under 25 ℃ ~ 60 ℃ environment is normal performance, and has good formability. 【Practical】High adsorption properties, thermal stability, chemical stability, has high mechanical strength, etc. 【Good Sealing】The ports are tightly connected, good sealing, no leakage; one way non return valve, air pump protection in power outage. Features: Medical grade material, safe and nontoxic; Strong resistance to acid, alkali, salt corrosion ability; Under 25 ℃ ~ 60 ℃ environment is normal performance, and has good formability. High adsorption properties, thermal stability, chemical stability, has high mechanical strength, etc. Description: Shell material: ABS Resin Diaphragm material: Silicon Rubber Diameter: 9.5-10mm Total Length: 4M Opening pressure: ≤0.5 Kpa Maximum back pressure: ≥0.3 Mpa Note: Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon. Package included: 1x Valve Package List