Features The cast iron single-acting check valve with plunger is made of high-quality metal for durability. Cast iron check valves have good sealing performance and reliable performance. The cast iron 3-way check valve is easy to install, the product has low resistance. Cast iron check valve with unidirectional piston suitable for air compressors etc. If you have any problem, contact us at any time and we will reply you within 24 hours. We guarantee that you will get the best solution and service. Specification: Item Type: Check Valve Material: Iron Interface size: 1/2 inch x 1/2 inch Thread Hole: Approx. 21 x 21 x 10 mm/0.8 x 0.8 x 0.3 inch Compatible: For air compressors, etc. Package list: 1 * Check Valve Package List 1 x Check Valve