Repair Kit Fits Brand Zurn For Use With Grainger Item Number 45K831 For Use With Mfr Model Number 2-500XL Includes Bolts and Nuts Cap Washer Diaphragm Disc Diaphragms Friction Ring O-Rings Seat Washer Spring Disc Springs Stainless Steel Washer Stems Union Gasket 500 Series Water Pressure Reducing Valve Size 2 in Material of Construction Brass Chrome Iron Rubber Stainless Steel For Use With Mfr No RK 2-500XL RK 2-500XLYSBR