High demand excavator spare part Horse head o ring 1.Material:NBR,PU 2.Various Sizes Available ... High demand excavator spare part Horse head o ring1.Material:NBR,PU2.Various Sizes Available3.Color:black ... 4.We can supply various o ring,o ring kit for Caterpillar,Komatsu,Hitachi,Isuzu,Hyundai,Kato ... us~ High demand excavator spare part Horse head o ring