3M 7440B百洁布 7440B百洁布 茶色金钢砂含量高，能快速移除氧化层。 包装：40片/件 3M Scotch-Brite Heavy Duty Hand Pad 7440B, 6 in x 9 in, 40 pads bulk per case Description Tight and dense, this pad is the most aggressive and durable web. Excellent for heavy cleaning, deburring, and finishing. May be used by hand, with a hand pad block or on an in-line sander. Abrasive mineral: Medium grade aluminum oxide. Color: Tan Can be used for hand cleaning,blending,finishing