Features Sponge material with buffering function can effectively reduce vibration damage to the product. Vibration resistant and noise reduction, easy to install. Magic sticky patch at the bottom, convenient to use. Four kinds of cushion pads to choose from, meet your different needs. Particularly suitable for pneumatic and electric self-cleaning polishing machines and grinding machines. Features: Sponge material with buffer function can effectively reduce vibration damage to the product. Vibration resistant and noise reduction, easy to install. Magic sticky patch at the bottom, convenient to use. Four kinds of cushion pads to choose from, meet your different needs. Particularly suitable for pneumatic and electric self-cleaning polishing machines and grinding machines. Specification: Material: sponge Weight approx. 20 g Diameter: 150mm/5.9in Thickness: 11.5mm/0.5in Hole Count: 6 Holes, 9 Holes, 15 Holes, 17 Holes (Optional) Package list: 1 x soft sponge pad Package List