This B71900-E-2RSD-T-P4S-UL bearing is a Super Precision angular contact bearing with 2 rubber seals . a 25° contact angle and a high speed design. This bearing is a universal fit single bearing with a light preload and a P4 precision rating. The bearing’s dimensions are 10x22x6. These bearings are well suited to Machine Tool applications . the main spindle bearing arrangements in particular . and are known for their guidance accuracy and high-speed capabilities.