Feature: * High insulation pump piston rings support high temperature resistance and fatigue resistance * It is not easy to wear objects, the service life of air pump piston ring is long. * Wear-resistant piston ring maintains impact resistance with low noise, easy to use in practical life.* Made of rubber material, cylinder liner rubber ring quality is guaranteed, you can use it with confidence.* Light and practical, 3 different rubber piston rings are available to meet your replacement needs. Specification:* Item Type: Rubber Piston Ring* Material: Rubber* Color: Yellow* Size: (outer diameter x inner diameter x thickness) For 550/600/750/950W air compressor: approx. 68x48x0.8mm For 1100W air compressor: approx. .68x48x1.0mm For 1500W air compressor: approx. 75x56x0.8mm* Quantity: 1 pc Package content: 1 x piston ring Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.