Feature: 1. Common accessories for air compressors, the cylinder liner is made of cast iron, durable, easy to disassemble and install. 2. The inner diameter of the cast iron cylinder liner is 63.7mm / 2.5in, the outer diameter is 69mm / 2.7in, and the height is 50mm / 2.0in. 3. Cylinder liner is mute, is an oil‑free air compressors accessory, suitable for pump head 1100W cylinder. 4. The cylinder liner has sufficient strength, rigidity, heat resistance and good wear resistance, and has good lubrication and cooling functions during operation. 5. If you encounter any problems during use or do not understand how to install, please contact us in time, we will try our best to solve the problem for you. Specification: Item Type: Cylinder Sleeve Material: Cast Iron Model: Oil-Free Cylinder 1100w Cylinder Liner Outer Diameter: Approx.69mm / 2.7in Inner Diameter: Approx.63.7mm / 2.5in Height: Approx.50mm / 2.0in Drive Mode: Pneumatic Purpose: 1100W Cylinder Liner of Air Compressors Oil-free Cylinder Package List: 1 x Cylinder Sleeve