Does not fit my Bosch random orbital sander. If anyone wants the measurements, here they are: Side 1: AD tapers slightly: 1.52-1.59", ID 1.24". This side is hard plastic. Side 2: OD is also slightly tapered: 1.40-1.44 inches, ID is 1.02 inches. This side is hard rubber - little flexibility. There is an o-ring groove on the 2 OD side, but the groove is much deeper than the o-ring diameter. The O-ring is completely submerged and cannot come into contact with anything. It doesn't make any sense to