... 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, ... feel free to contact us~ High demand excavator spare part Horse head ...