【Product】: This is a quality Air Compressor Cylinder Sleeve, Oil-free, Silent. It's a important component for your air compressor system 【Material】: Made of sturdy metal material that ensures longevity and reliability 【Size】: The product is available in 6 sizes for different air compressors, compact enough to fit in most air compressor systems without taking up too much space 【Package Includes】: Each purchase comes with a Cylinder Liner, providing you with everything you need for your air compressor system 【Features】: Our product boasts an oil-free and silent features, making it ideal for environments where noise reduction is important while maintaining efficient performance of your air compressor system Specification: Material: Metal Size Chart: Cylinder Sleeve sizes(Inner diameterxOuter diameterxHeight) : Type 1: 6.35cmx6.9cmx2.45cm/2.50inchx2.72inchx0.96inch Type 2:6.35cmx6.9cmx2.55cm/2.50inchx2.72inchx1.00inch Type 3:6.35cmx6.9cmx4.75cm/2.50inchx2.72inchx1.87inch Type 4:6.35cmx6.9cmx5cm/2.50inchx2.72inchx1.97inch Type 5:6.96cmx7.5cmx4.75cm/2.74inchx2.95inchx1.87inch Type 6:6.96cmx7.5cmx3.55cm/2.74inchx2.95inchx1.40inch Package Includes: 1 Air Pump Cylinder Liner Note: Please allow slightly errors due to manual measurement and different monitors.