7211BMUC3T103K Nachi Angular Ball Bearing 55mm x 100mm x 21mm Made in Japan 7211BMUC3T103K Nachi Angular Ball Bearings, 15 Contact Angle, Polyamide resin cage, Abec-5 Made in Japan, 7211BMUC3T103K inner diameter is 55mm, 7211BMUC3T103K outer diameter is 100mm, 7211BMUC3T103K width is 21mm.