Closed coat structure for more material removal and better finishing.
. United Abrasives - Sait 3A Fiber Disc 4-1/2" x 7/8" 60 Grit Aluminum Oxide United abrasives - sait 50161 3a fiber disc 4-1/2" x 7/8" 60 grit aluminum oxide premium aluminum oxide grain with grinding aid. Resin over resin construction for a strong bond that is resistant to heat and moisture.Vulcanized fiber backing for heavy duty sanding.