This HSS7011-E-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, a P4 precision rating, and small steel balls. The bearing's dimensions are 55x90x18. 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.