The DKWU dust ring is a gold outer skeleton dust ring made of polyurethane rubber for installation in the external groove of reciprocating motion. The dust ring has a triple lip design, which provides an independent design of the outer lip (waterproof) and the oil lip (control oil film) under the basic premise of the usual dust design. Suitable for all kinds of construction machinery or agricultural machinery in dusty, humid conditions. Due to the presence of the oil lip, we have added pressure relief holes to prevent the storage from popping out.