Description U.S Seal General Service Seal Assembly, Size: 5/8 Inch Shaft, Buna Elastomers, Phenolic Primary Ring, Ceramic Seat, Stainless Steel Hardware, For Use With: Doughboy(R) Industries; Gecko Alliance Inc. A, A and B, C, D Series, Dominator Medium Head Pre-1995; Acura Spa Systems Inc. Aquaheat, Aquaheat Plus, Magnaflow, Magnaflow 56, Maverick, Supercharger, Supercharger II; American Products American II(R), Bronze-Bronze, Eagle, Maxim(TM), Powerglass(R), Ultra-Flow(R); Ampro Diaclear Dura-Flo(R), Noryl Turbo, XL 600; Anthony and Sylvan; Astral Pool Astramax; Premier Pumps - Pre 1988, 455/456, 500/600; Purex/Hydrotech WhisperFlo(R); Sta-Rite CF/CFA, HP-Series; Jandy PB4-60; Waterway Plastics