This sanding pad is offered in the Amazon hardware store under the Bosch Part number 2608601117 as Bosch Accessories. Among these accessories number of sanding pad can also be found on the website of Bosch as an accessory for the Sander GEX 125-1 AE. In fact, the delivered item does not fit on the device. Instead of 4 holes for screw he has only three plus a circumferential ridge which vehindert the rest on the base. However, the delivered packaging of Amazon shows the correct part number. The who can understand.