Feature:1. Light and practical pump piston rings keeps 10pcs quantity, which can meet your replacement needs.2. Easily used in the practical life, cylinder rubber ring can be wear resistance, impact resistance and low noise.3. Piston ring's long service life helps itself with high practicality and durability, not easy to wear the contact object.4. Supports high insulation, such air pump piston ring adopts high temperature resistance, which also keeps fatigue resistance.5. Made of rubber material, cylinder liner rubber ring's quality is guaranteed, you can use it with confidence.Spec:Item Type: Cylinder rubber ringMaterial: RubberSize: Approx.75 x 56 x 1mm / 3 x 2.2 x 0.04inPackage List:10 x Pump Piston Ring