Arbor Spacer, Inside Diameter 1.75 in, Outside Diameter 2.75 in, Inside Diameter Tolerance +0.011/-0.000 in, Outside Diameter Tolerance +/-0.002 in, Thickness 0.062 in, Thickness Tolerance +/-0.0025 in, Keyway Width 7/16 in, Keyway Depth 3/16 in, Round Shim Type Arbor Spacer, Material Steel, Finish Plain, Temper Full Hard, Material Grade/Class Ungraded, Rockwell Hardness B90, Tensile Strength 80,000 psi, Manufacturer Location Made in USA*, Package Quantity 10