Features 1、Made of high quality material, durable, the air tightness of the piston and the cylinder wall is good 2、When the axial clearance of the gas ring is greater than 0.13mm, it is recommended to replace the piston ring 3、Standard production and fine craftsmanship, easy to install and disassemble 4、The piston ring is suitable for 70mm cylinder diameter, standard workmanship, simple to replace 5、The piston ring is suitable for 0.67/1.13 7.5KW motor and 10HP air compressor Specification Item Type: Piston Ring Model: 70 Piston Ring Drive Mode: Pneumatic Piston Ring Outer Diameter: Approx. 74mm / 2.9in Piston Ring Inner Diameter: Approx. 66mm / 2.6in Cylinder Diameter: Approx. Approx. 70mm / 2.8in Applicable Models: Cylinder diameter 70mm, cylinder 70mm, etc, 0.67/1.13 7.5KW motor 10HP air compressor accessories Description: [70 Piston Ring] The number "70" means that the cylinder diameter is 70mm Package List 3 x Piston Ring