Features This in-line check valve allows fluid or air flow in one direction, preventing backflow. The test value is widely used in many industrial applications, including fuel pumps, household appliances, agricultural equipment, etc. This one-way check valve is made of plastic, safe, non-toxic and rust-proof. The plastic check valve is easy to install and convenient to unscrew and replace. These check valves are suitable for liquid systems to prevent the reverse flow of liquids. Specifications: - Condition: 100% New - Colour: White - Material: plastic - Hose Size: 4mm/6mm/8mm/12mm - Opening pressure: >0.015MPA - Compatible: Suitable for water, petrol, oils and other liquids Note: Please allow 3-5mm error due to manual measurement Included: 1 x 1 way check valve Package List