6Set STD Piston Rings 65.02503-8047 65025038047 Fits for Doosan DL06 Engine (3.0x2.5x4.0mm) This set includes six standard size piston rings with dimensions of 3.0x2.5x4.0mm.The is 65.02503-8047 or 65025038047.Designed to fit the Doosan DL06 engine.The rings are engineered for consistent compression sealing and reduced oil consumption.Suitable for use in engine rebuilds and maintenance applications. This is a compatible aftermarket component.Brand names are cited solely to show which devices it works with.