Features 1、The cast iron check valve is made of metal iron, which is durable and has a long service life. 2、The air compressors valve has high hardness, wear resistance and is not easy to deform. 3、The check valve has good sealing performance, reliable performance and strong practicability. 4、The air compressors check valve is easy to install, the product has low resistance, small size and easy to carry. 5、One Way piston type 3 way check valve is mainly suitable for air compressors, etc. Specification Item Type: Check Valve Material: Iron Interface Size: 1/2in Threaded Hole: Approx. 21 x 19 x 10mm/0.83 x 0.75 x 0.39in Scope of Application: Suitable for Air Compressors, etc. Package List 1 x Check Valve