1. SANDING DISC 6 INCH OR 150MM, GRIT 320, PAPER BACKED VELCRO TYPE ALUMINIUM OXIDE, SPECIFICATION NUMBER: IS: 715- 2002, NUMBER OF HOLE: 06. Make/ Brand- BOSCH/ 3M/ NOR TON 2. escription: SANDING DISC 6 INCH OR 150MM, GRIT 150, NUMBER OF HOLE: 06 Make/ Brand- BOSCH/ 3M/ NORT ON