Features Magic adhesive patch background, convenient to use. Sponge material, with damping function, can effectively reduce the vibration damage to the product. Especially suitable for the pneumatic and electric type of self-cleaning polishers and grinding machines. Four types of cushions for your choice, meet your different needs. Shake-proof and noise reduction, easy to install. Specification: Material: Sponge Weight approximately. 20g/0.7oz Diameter: 150mm/5.9 inches Thickness: 11.5 mm/0.5 inch Hole quantity: 6 holes, 9 holes, 15 holes, 17 holes (Optional) Features: Magic adhesive patch background, convenient to use. Sponge material, with damping function, can effectively reduce the vibration damage to the product. Shake-proof and noise reduction, easy to install. Four types of cushions for your choice, meet your different needs. Especially suitable for the pneumatic and electric type of self-cleaning polishers and grinding machines. Package List: 1 x Soft Sponge Pad Package List