part 18688 O-Ring, Inlet Manifold-70D Cat Pumps code 18688 Details Cat Pumps number18688 DescriptionO-Ring, Inlet Manifold-70D Qty per pump3 Also comes in 32541 Seal kit, NBR (STD)32542 Seal kit, NBR (STD)33234 Seal kit, NBR (STD)76209 Seal kit, STHT (.3400) Fits these pumps Cat Pumps 35 Frame 4 3541DHS35453545HS3547HS Cat Pumps 36 Frame 2 3641X3642X