Pack 30 5" 24g Resin Fiber Sanding Grinding Disc A/o 24 Grit Coarse 7/8" Arbor Pack of 30 5" Fiber Resin Disc 24g Size: 5" Arbor: 7/8" Grits: 24 Material: Aluminum Oxide Backing: Heavy Duty Vulcanized Fiber Machine Used On: 5" Angle Grinders Max Speed: 8,000 Safety: Safety glasses, gloves, ear protection