Item Type: Check Valve Material: PP Function: Connect the hose to prevent the backflow of gas or liquid Scope of Application: Fish tank, food and beverage, medicine equipment, chemical industry Size: Approx.4mm/0.2in Package List 10 x Check Valve 1Replacement: This one way check valve can be used to replace the broken check valve and fit perfectly, to prevent the backflow of gas or liquid 2Strong Pressure Resistance: The stop check valve has sufficient pressure bearing capacity and rigidity to meet actual use requirements within appropriate range 3High Performance: The check valve has good thermal performance, strong chemical stability, non toxic and odorless 4Excellent PP Material: The stop check valve is made of high quality PP plastic material, which is wear resistant and durable 5Application: This one way check valve is widely used for fish tank, food and beverage, medicine equipment, chemical industry, etc.