Item: Aluminum Oxide Abrasive Flap Sanding Discs Application: Iron, steel, ferrous meal, etc. Brand: ... Model No.: T27/T29 Type: Flap Discs Diameter: 4'', 4.5'', 5'', 6'', 7'', etc. Grade: 24, 36, 40, 60, 80, 100 ... , 180, 240, 320, 400 and 600 grit Color: Maroon Abrasive Grain: Premium Aluminum Oixde Max Speed: 13,700 rpm Backing: Fiberglass or ...