Kegco KC LH-RBK-54 Regulator Rebuild Kit for 54 Series Regulators, Black Includes all parts necessary to rebuild Kegco 54 series regulators Have your old regulator function like new! Jump Ring, Spring Seat, Adjusting Spring, Diaphragm, Big Nylon Washer Valve Case Nut, Center Valve, Reverse Spring, Safety Valve Manufactured in China