產品描述： 3M Diamond Microfinishing Film Rolls 675L Diamond mineral bonded to a 5 mil polyester film backing. Designed for superfinishing and fast finish reduction on hard materials including thermal spray coatings, ceramics, carbides, chilled iron, granite and others. Full Description: Helps improve productivity and reduce the cost of superfinishing of hard materials -- while achieving finish requirements faster, with fewer passes and faster traverse rates than other alternatives. Also helps reduce abrasive cost, by enabling slow abrasive feed rates and fewer steps. Benefits and Features: Designed to improve productivity, reduce costs Available in 20, 30, 45, 74, and 125 micron grades