Ball Valve Cast Iron Check Valve For Air Compressor Feature:1. Made of high quality iron metal materials, durable, suitable for air compressor, etc.2. Easy installation, low resistance, good sealing performance, reliable performance.3. Used to direct the stream in one direction and prevent reverse flow in the piping system.4. It is often combined with throttle valve, sequence valve, etc., to form one-way throttle valve and one-way sequence valve.5. The check valve is suitable for various liquids and gases, water, air and some corrosive liquids. Specification:Item Type: Check Valve Material: Iron Interface Size: 1/2in Threaded Hole 1: Approx. 20x10mm / 0.8 x 0.4in (Outer Diameter & Inner Diameter)Threaded Hole 2: Approx. 21x12mm / 0.8x0.5in (Outer Diameter & Inner Diameter)Application Scope: Suitable for Air Compressor, etc. Package List:1 x Check Valve 1) we accept Alipay, West Union, TT. All major credit cards are accepted through the payment processor's secure escrow. 2) Payment must be made within 3 days of placing the order. 3) If you can't check out immediately after the auction ends, please wait a few minutes and try again, payments should be completed within 3 days. About Shipping 1.