3M Production™ Paper Abrasive
9" x 11" Coated Abrasive Sheet
Grade 40D
Tough mineral-bond construction along with special treatment to resist loading means a long-lasting, fast-cutting abrasive. Use for dry sanding only by machine or hand on fiberglass, wood or metal.
ID 346U
Aluminum oxide sheet constructed on a heavy, D-weight paper backing. Tan mineral coating.