... :0/-2μmWeight:21.5kg ten thousand picture of 4*21.8mm needle roller:2.The details of our products:Table1 ... 0.001mmSurface finish Within 0.0001mmDiameter 0.7mm to 80mmLength 2mm to 150mmHardness standard HRC58—65Grade G1,G2,G3,Chamfer0. ... 1/-3,-2/-41h13-3/-5,-4/-6,-5/-7-6/-8,-7/-9,-8/-10G30/-1030/-3,-1.5/-4.5,-3/-61.5-4. ... 5/-7.5,-6/-9,-7/-10G50/-1050/-5,-3/-8,-5/- ...