The Rolair U1107 Air Compressor Capacitor provides electrical support needed for compatible air compressor motor operation. The capacitor stores and releases electrical energy to assist the motor during startup and operation. This replacement component is designed to replace a worn or failed capacitor during compressor maintenance or repair. Proper installation helps support motor sta... https://www.wholetoolbox.com/rolair-u1107-air-compressor-capacitor/U1107.html