... of excavator.2.Optional color for you of the Oil Seal,Rubber Gasket, O-Ring :Black, red, yellow, brown, white, ... shaft,excellent resistant performance of dry grinding.4.Dustproof oil seal can be used for excavator brands such as CATERPILLAR, ... HITACHI, KOBELCOCATERPILLAR, Volvo, KOMATSU, HITACHI, KOBELCO, KATO, SUMITOMO. 5.Oil seal provides the basic three functions: sealing, dustproof and fixing.6 ...