7001CYDUP4BNLS Nachi Angular Ball Bearing, 15 Contact Angle, Polyamide resin cage, ABEC-7 Made in Japan, here are the dimensions of the 7001CYDUP4BNLS, 7001CYDUP4BNLS inner diameter is 12mm, 7001CYDUP4BNLS outer diameter is 28mm, 7001CYDUP4BNLS width is 8mm.