'Arbor Shim, Low Carbon Steel, Full Hard Temper, Thickness 0.125 In, Thickness 3.175mm, Thickness Tolerance +/-0.003 In, Inside Dia 1 3/8 In, ID Tolerance +0.011 In, Outside Dia 1 7/8 In, OD Tolerance +/-0.002 In, Tensile Strength 80, 000 PSI, Rockwell Hardness B84, Meets AISI 1008-1010, Package 10'