The DKWY dust ring is a metal outer skeleton dust ring made of nitrile rubber, suitable for installation in the external groove of reciprocating motion. The dust ring adopts a three-function design. On the dust lip, special nitrile rubber material is used to match the oil lip design, which can effectively control the thickness of the oil film while effectively avoiding the crawling and shaking of the oil cylinder. The special bottom lip design prevents water from flowing into the metal frame and causing the end cap to rust. Suitable for all kinds of engineering machinery or agricultural machinery in dusty, humid conditions.