7" x 1" BENCH GRINDING WHEEL 60 grit Vitrified 1" Arbor includes 3/4" 5/8" 1/2" Bushing Abrasive: Aluminum Oxide Dimension: 7" dia x 1" width Bore : 1" includes 3/4" 5/8" 1/2" Bushing Grade Code : 60 Grit Bond : Vitrified