Specially coated to resist clogging, this tough sandpaper stays significantly sharper longer-sanding faster than comparable grit. Suitable for dry sanding most surfaces including paint, wood, metal, plastic and fiberglass. Excellent for between-coats finishing applications. Will not discolor what you sand. Has a special "A" weight paper that is flexible and tear-resistant. Assortment contains one sheet each of 60, 100, and 180 grits. Abrasive Material: Aluminum oxide Recommended Usage: General purpose dry sanding on fiberglass, wood, metal, plastic Sheet/Disc Size: 9" x 11