part 670235 Backup Ring, Packing Cat Pumps code 670235 Details Cat Pumps number670235 DescriptionBackup Ring, Packing Qty per pump3 Also comes in 32531 Seal kit, NBR (STD)32532 Seal kit, NBR (STD) Fits these pumps Cat Pumps 36 Frame 3 3631X3631XD3632X