Arbor Shim Low Carbon Steel Full Hard Temper Thickness 0.062 In Thickness 1.575mm Thickness Tolerance +/-0.0025 In Inside Dia 1/2 In ID Tolerance +0.011 In Outside Dia 3/4 In OD Tolerance +/-0.002 In Tensile Strength 80 000 PSI Rockwell Hardness B90 Meets AISI 1008-1010 Package 10