Feature:1. Using highquality materials, the air tightness of the piston and the cylinder wall is good2. When the axial clearance of the gas ring is greater than 0.13mm, it is recommended to replace the piston ring3. Standard production and fine craftsmanship, easy to install and disassemble4. The piston ring outer/inner diameter is 68/62mm, which is convenient to replace the damaged one5. Suitable for cylinders with a cylinder diameter of 65mm, 2.2KW 3.0KW motor, 0.25 0.36 air compressor, air pump, etc.Specification:Item Type: Piston RingModel: 65 Piston RingDrive Mode: PneumaticPiston Ring Outer Diameter: Approx. 68mm / 2.7inPiston Ring Inner Diameter: Approx. 62mm / 2.4inCylinder Diameter: Approx. 65mm / 2.6inApplicable Models: Cylinder diameter 65mm, cylinder 65 mm, etc, 2.2KW 3.0KW motor 0.25 0.36 air compressor air pump accessoriesDescription: [65 Piston Ring] The number "65" means that the cylinder diameter is 65mm .Package List:3 x Piston Ring