The Complete Repair Kit is compatible with the 1” Model 600XL Pressure Reducing Valve. Repair Kit components include one Strainer Cap Washer, Screen, Cap Washer, Seat Washer, Plunger Stem Washer, Seat Gasket, Union Gasket, O-Ring, Stem, Diaphragm, Diaphragm Disc, Bolt/Nut, Spring, Spring Disc, and Friction Ring. Repair Kits are sold as accessories for quick and simple repair needs extending the life of your pressure reducing valve.