Rubber Vibration Isolator is designed for use with air compressors, diesel engines, gasoline engines, and water pumps. It can also be used with welding machines and other equipment as mounting components to help maintain normal operation and improve working environment by reducing noise and vibration. These mounts provide effective noise and vibration reduction. Product Name: Rubber Vibration Isolator Buffer Material: Metal, Rubber External Thread Size (approx.): M4 x 10mm (diameter * L) Internal Thread Size (approx.): M4 x 6mm (diameter * L) Rubber Size (approx.): 15mm x 15mm Total Height (approx.): 25mm / 1 inch Color: Black, Silver Weight: 22g Package Content: 4 pcs x Rubber Vibration Isolator Buffer Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display settings may cause slight color differences between the image and the actual item. Measurement error is +/- 1-3cm.