6308-2NSENR Nachi Bearing With Snap Ring (C clip) 40mm x 90mm x 23mm Made in Japan 6308-2NSENR Nachi Bearing with a Snap Ring, the 6308-2NSENR inner diameter is 40mm, the 6308-2NSENR outer diameter is 90mm, the 6308-2NSENR width is 23mm.