Arbor Shim, Round Shim Type Arbor Shim, Inside Diameter 0.313 in, Outside Diameter 0.505 in, Thickness 0.006 In., Thickness Tolerance +/-0.0005 in, Material Stainless Steel, Material Grade/Class 18-8, Finish Plain, Color -, Temper Not Rated, Tensile Strength 70,000 psi, System of Measurement Inch, Application -, Rockwell Hardness B80, Package Quantity 25