Abrasives Bond Type Vitrified Abrasive Material Aluminum Oxide Grade Medium Arbor Hole 1 1/4 inch Maximum RPM 3,600 Grit 60 Diameter 7 inch Width 1 inch Hardness I 7 inch × 1 inch × 1 1/4 inch 32A Toolroom Wheel Type 05 Recessed One Side 60 Grit Aluminum Oxide Type 5 - Purple Aluminum Oxide Recess 1 Sided Wheel TOOLROOM WHEEL 7 inch × 1 inch × 1 1/4 inch TY 05 Wheel Type Type 5 Thickness 1 inch Specification 32A60-IVBE Surface Grinding Wheels