Motorad T51 Engine Coolant Reservoir 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. Cap Depth: 0.50 in Coolant Recovery System: Open, Closed System Indicator Markings: Yes Indicator Markings Color: Yellow, Black Meets or Exceeds Original Equipment Manufacture Specifications: Yes Overall Height: 1.11 in Pressure Rating (PSI): 16 Prop 65: WARNING: Cancer and Reproductive Harm - www.p65WARNINGs.ca.gov SAE Pressure Range: 14-18 PSI Attachment Type: Threaded Color: Black Diameter: 1.97 in Material: Plastic, Rubber Maximum Pressure Rating: 16 PSI Pressure Release Lever: No Pressurized: Yes Type: Standard Vented: Yes