The Complete Poppets, Springs and Seats Repair Kit is compatible with the 1-1/4” to 2” Model 975XL and 975XL2 Reduced Pressure Principle Backflow Preventer. Repair Kit components include two Check Seat O-Rings, two Check Seats, two Retaining Bolts, two Seal Ring Retainers, two Seal Rings, two Poppets, one #1 Check Spring, two Cover O-Rings, one #2 Check Spring, one Relief Valve Seat O-Ring, one Relief Valve Stem O-Ring, one Relief Valve Seat, one Spring, one Retaining Bolt, one Seal Ring Retainer, and one Seal Ring.