Air Check Valve Secondary A.I.R. Injection Check Valve Adjustable:No Color/Finish:Gray Inlet Size (in):0.688 In. Length:2.875 In. Material:Cast Aluminum Maximum Pressure Rating (psi):55 PSI Mount Hole Diameter:0 Outlet Size (in):0.588 In. Package Contents:1 Secondary Air Injection Check Valve; 1 Gasket Port Quantity:2 Valve Type:Solenoid Working Temperature Range:-28.8 Deg. C To 149 Deg. C