This S7020ACD/HCP4ADBA bearing is a Super Precision angular contact bearing with 2 rubber seals, a 25° contact angle and the balls are hybrid ceramic, also known as bearing grade Silicon Nitride. This is a back to back arrangement double set of bearings with a light, preload and a P4 precision rating. The bearing's dimensions are 100x140x24. Often used in Machine Tools, or other precision applications, these bearings are known for their high-speed capabilities, robust seals, and superior accuracy.