part 44001 O-Ring, Seat Cat Pumps code 44001 Details Cat Pumps number44001 DescriptionO-Ring, Seat Qty per pump6 or 44001 Also comes in 30735 Seal kit, STHT (.3400)30914 Seal kit, NBR (STD)30915 Valve kit, NBR (STD)30982 Valve kit, NBR (STD)30983 Seal kit, NBR (STD)33915 Seal kit, HT (.3000) Fits these pumps Cat Pumps 3 Frame 9 230231237240241247270271277 Cat Pumps 3CP 6 3CP1211CS3CP1211G3CP12213CP12313CP12413CP1241G