Radiator cap Manufactured to meet all OEM specifications. Designed to be easy to install and remove. Manufactured from high quality components with proper relief and vacuum valves. Quality tested to stand up to even the most demanding automotive cooling systems. Coolant Recovery System: Open, Closed System Lever Type: Standard Prop 65: WARNING: Cancer and Reproductive Harm - www.p65WARNINGs.ca.gov SAE Pressure Range: 20-22 PSI Attachment Type: Cam On Cap Depth: 1.05 in Cap Finish: Silver Coolant Recovery System: No Filler Neck Depth: 1.05 in Filler Neck Height: 1.05 in Filler Neck Inside Diameter: 1.54 in Filler Neck Outside Diameter: 1.91 in Grade Type: OEM Height: 1.14 in Lever Type: No Material: Stainless Steel, Rubber Pressure Rating: 22 PSI Quick Pressure Release: No Shape: Round Valve Outside Diameter: 1.54 in Vented: Yes Width: 2.33 in