Pump seal for newer AquaFlo Flo-Master FMCP/FMHP pumps, AquaFlo Flo-Master XP Series, Triton Challenger and Dynamo II and Dominator. Also replaces pump seals on most JacuzziŽ pumps that have the four stainless steel bolts in the face of the wet end.
Seal face on spring loaded side is 15/16" maximum, with 9/16" opening on the rubber shaft seal. Ceramic base is 1 3/32" maximum with a 5/8" opening, and ceramic seating rubber cup is 1 1/4" across.
Find replacement instructions at SpaSupport.Com