service kit: seal kits 31648 Seal kit, EPDM (.0220) Cat Pumps code 31648 In the kit Part numberDescriptionPosition 48432O-Ring, Plunger Retainer98 48904O-Ring, Seal Case121 Kits per pump: 1. Fits these pumps Cat Pumps 5CP 5 5CP2120W5CP2140WCS5CP2150W5CP61205CP6120CS