产品描述： 3M :精密研磨卷（EMMD）: 372L 精密研磨卷: 3M 372L - 3M Microfinishing Film 372L Rolls An aluminum oxide micron roll resin bonded to a 5 mil polyester film backing. The backing has a friction grip coating for slip resistance. Precision finishing of cylindrical surfaces such as automotive camshafts & crankshafts.