Features Supports high insulation, such air pump piston ring adopts high temperature resistance, which also keeps fatigue resistance. With long service life and high practicality, this piston ring is not easy to wear the contact object. Piston ring keeps wear resistance, impact resistance and low noise and also it can be easy to use in the practical life. Light and practical, there are 10pcs rubber piston ring to meet your replacement needs. Made of rubber material, cylinder liner rubber ring's quality is guaranteed, you can use it with confidence. Specification: Item Type: Cylinder rubber ring Material: Rubber Size: Approx.68 x 48 x 1mm / 2.7 x 1.9 x 0.04in Package List: 10 x Pump Piston Ring Package List 10 x Pump Piston Ring