3M 6" 316U STIKIT RED ABRASIVE "A" WEIGHT SANDING DISC ROLL - 3M's Red Abrasive Stikit disc roll uses aluminum oxide on an "A" weight paper backing. The 316U is recommended for use on paint, primer, metal, wood and fiberglass. Use for fine featheredging or last final sanding step before priming. Disc is 6" x NH. Product is sold by the roll of 100 discs. 6 rolls per case.