GITACHI 20060 8" Bench Grinding Wheel 60 Grit- 8 Inch X 3/4 Inch X 5/8 grinding wheel 8 inch dia and 5/8 inch arbor Bonded Aluminum Oxide Abrasive, Medium Grit, Replacement Wheel for 8-Inch Bench Grinders, Maximum 3700 RPM, 8-Inch Diameter, 3/4-Inch Thick, our web site :www.gitachi.com