6011-2NSENR Nachi Bearing 55mm x 90mm x 18mm With Snap Ring (C clip) Made in Japan 6011-2NSENR Nachi Bearing with a Snap Ring, the 6011-2NSENR inner diameter is 55mm, the 6011-2NSENR outer diameter is 90mm, the 6011-2NSENR width is 18mm.