Arbor Shim Low Carbon Steel Full Hard Temper Thickness 0.125 In Thickness 3.175mm Thickness Tolerance +/-0.003 In Inside Dia 3/4 In ID Tolerance +0.011 In Outside Dia 1 1/8 In OD Tolerance +/-0.002 In Tensile Strength 80 000 PSI Rockwell Hardness B84 Meets AISI 1008-1010 Package 10