Air Check Valve Secondary Air Injection Check Valve Adjustable:No Color/Finish:Natural Inlet Size (in):0.9 In. Length:4.436 In. Material:Cast Aluminum Maximum Pressure Rating (psi):5 PSI Mount Hole Diameter:0.262 In. Outlet Size (in):0.597 In. Package Contents:1 Secondary Air Injection Check Valve, 1 Gasket Port Quantity:3 Thread Diameter:0 Valve Type:Spring Loaded Working Temperature Range:-40C To 125C