#2 Check Assembly Repair Kit, 8" and 10" 475ST used with RK8-450STDACK2. Kit Contains O-Ring, Seat, Bolt, Poppet Retainer (x6), Handle, Poppet Assembly, Washer (x6), O-Ring, Retainer (x6), Poppet Retainer, Seal Ring, Seat Assembly, #2 Poppet, Washer, Seat Retainer, Nut, and Seat Retainer.