#1 Check Assembly Repair Kit, 8" and 10" 450STDA used with RK8-450STCK1. 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 (x4), Nut,  and Seat Retainer.