Sait 75540 5" x 7/8" 40-Grit Saitlam F Aluminum Flap Discs 10pkType 29- Conical Shape, Fiberglass Backing. Sait 40-Grit Saitlam F Aluminum Flap Discs. Aluminum oxide grain. General purpose, long life. Closed coat structure for more material removal. Ferrous and/or non-ferrous metals (iron, steel, aluminum, brass, copper, etc.). Fiberglass backing for lighter, more silent operation. Fiberglass backing will not splinter or smear on the workpiece. Backing wears with the abrasive cloth. Go from stock removal to finishing with one disc. Specifications: RPM - 12200. Tech Info: Resin over resin construction for a strong bond resistant to heat and moisture.
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United Abrasives Sait 8004285927