The Kegco Regulator Rebuild Kit includes all the parts necessary to rebuild a Kegco 54 series regulator that has stopped functioning properly from extended use Use this kit to have your old regulator working like new! Included with the kit are the Jump Ring (1) Spring Seat (2) Adjusting Spring (3) Diaphragm (4) Valve Case Nut (5) Center Valve (6) Nylon Washer (7) Reverse Spring (8) and Safety Valve (9)