Scotch-Brite(TM) SE Surface Conditioning FB Belt, 8 in x 132 in A MED, 2 per case A coarse, tough, aggressive non-woven belt for heavy duty deburring and finishing. The smooth, tough, stretch-resistant nylon film backing works well with platens. Abrasive mineral: Medium grade aluminum oxide. Color: Maroon/Blue MOS: 6500 SFPM