Chrome Plated Plastic Valve Stem Covers For&Nbsp;Your Tires. Tpms Compliant, Including Inner "O"&Nbsp;Ring Seal Ensuring a Clean Valve Orifice To&Nbsp;Maintain Consistent Tire Pressure. Uv-Resistant&Nbsp;Film Packaged In Hang-Tab Box. Tpms Sensor&Nbsp;Federally Mandated Installed All New Vehicles&Nbsp;Sold After September 2007 Electronically&Nbsp;Monitors Air Pressure.