3Pcs Piston Ring 51mm Replacement for 1.1/1.5KW Motor 0.12/0.17 Air Compressor A
51mm / 2in. When the axial clearance of the gas ring is greater than 0.13mm, you should replace the piston ring. Item Type: Piston Ring. Model: 51 Piston Ring. 54mm / 2.1in. 48mm / 1.9in. 3 x Piston Ring.