6001-2NSENR Nachi Ball Bearing With Snap Ring (C clip) 12mm x 28mm x 8mm Made in Japan 6001-2NSENR Nachi Bearing, Made in Japan, with a Snap Ring, 6001-2NSENR inner diameter is 12mm, 6001-2NSENR outer diameter is 28mm, 6001-2NSENR width is 8mm.