Description:

Ring inner diameter: 47mm/1.85inch; Ring Outer Diameter: 49mm/1.94inch. replacement piston ring set(Included 2 x Balance Rings and 1 x Seal Ring).. The main job of piston rings is to seal the combustion chamber against the piston housing and to channel the heat from piston to cylinder.. Provides better seal, improves performance, and decreases oil consumption.. Note: Get your air compressor shut down when change piston rings. Suitable for 47mm OD piston air compressor..