Straight Grinding Wheel Abrasive Wheel Type Type 1 Abrasive Wheel Diameter 6 In. Thickness 3/4 In. Arbor Hole Size 1-1/4 In. Abrasive Material Aluminum Oxide Abrasive Grit 60 Abrasive Wheel Hardness K Max RPM 4140 Series 38A Specification 38A60-KVBE Grade Medium Bond Type Vitrified Package Quantity 5