6306-2NSENR Nachi Bearing With Snap Ring (C clip) 30mm x 72mm x 19mm Made in Japan 6306-2NSENR Nachi Bearing with a Snap Ring, the 6306-2NSENR inner diameter is 30mm, the 6306-2NSENR outer diameter is 72mm, the 6306-2NSENR width is 19mm.