Features The interface cushion pad adopts s​ponge material with buffering function, which can effectively reduce the damage of vibration to the sanding soft pad. This soft sponge pad is e​specially suitable for pneumatic and electric type of self-cleaning polishing machine and grinding machine. Shake-proof and noise reduction, easy to install. Magic adhesive patch bottom, convenient to use. Four types of cushion pad for your choice, meet your different needs. Features: The interface cushion pad adopts sponge material with buffering function, which can effectively reduce the damage of vibration to the sanding soft pad. This soft sponge pad is especially suitable for pneumatic and electric type of self-cleaning polishing machine and grinding machine. Shake-proof and noise reduction, easy to install. Magic adhesive patch bottom, convenient to use. Four types of cushion pad for your choice, meet your different needs. Specification: Material: Sponge Weight: Approx. 20g/0.7oz Diameter: 150mm/5.9inch Thickness: 11.5mm/0.5inch Hole Quantity: 6 holes, 9 holes, 15 holes, 17 holes (Optional)  Package List: 1 x Soft Sponge Pad Package List