The CoolCap is manufactured from 316 stainless steel and polished to a bright mirror finish. The 3" diameter is only .080" thick and can be easily recessed if desired. The flush cap is actuated with a stainless interface key that will unscrew the cap from its o-ring seal. A stainless chain prevents leaving or losing the gas cap after filling up your tank. Easy to install and easy on the eyes, the CoolCap is the perfect finishing touch to your ride. CoolCap comes with all mounting hardware and instructions for easy installation.