The Complete Repair Kit is compatible with the 3/4” 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.