'Arbor Shim, Shim Material Steel, Grade 1008-1010, Shim Thickness 0.0310 In., Thickness Tolerance +/-0.0015 In., Inside Dia. 1.750 In., Inside Dia. Tolerance +0.011 In., Outside Dia. 2.750 In., Outside Dia. Tolerance +/-0.002 In., Shim Temper Full Hard, Tensile Strength (PSI) 80,000 psi, Rockwell Hardness B90, Meets/Exceeds AISI 1008-1010, Package Quantity 10'