3M(TM) Microfinishing PSA Film Type D Roll 366L, 4.5 in x 150 ft x 3 in 180 Micron, 4 rolls per case Precision, micron-graded, resin-bonded, polyester film backing. Aggressive cut with uniform finish. Load-resistant coating provides greater efficiency and longer product life. Use on plastic, fiberglass, wood, metal, solid-surface composites.