EMI Supply, Inc : Carborundum Abrasives. Carborundum Premier Red PSA Paper Disc 5"x5 Hole Vacuum P120 100Roll Abrasive Sandpaper Disc, Paper, PSA - Pressure Sensitive Adhesive, 5 Inch Diameter, 5 Hole, Vacuum, Grit P120, CAP Code B 0912 DO, P-Graded Heat Treated Aluminum Oxide, B-Weight Backing, Link Disc Roll, 100 Discs Per Roll