Product Description ---Self-fastening, high quality Hook and Loop backing ---Fits perfectly on your BOSCH machine ---Fits PEX220A, PEX 220 AE, Skil 7402/7490 BOSCH Sanders ---Extra intake holes to extract the maximum amount of dust and helps clear from the work surface, increasing disc life ---Our backing pads are extremely well made and have extra holes, for dust extraction, compared to the other BOSCH backing pads on the market ---This pad works with both Conventional 8 Hole sanding discs and PRONET AbrasiveNet Sanding Discs along with other Mesh abrasive discs ---The perfect upgrade to your BOSCH machine to gain more dust extraction Product Information Diameter: 123mm Thickness: 11mm Centre Hole Diameter: 26mm Larger Hole Diameter: 10.6mm Smaller Hole Diameter: 4mm Max Speed: 12,000 RPM QTY Per purchase: 1 Pad.