3M Trizact Cloth Belt, 237AA, A16, 24 in x 48 in (609.6 mm x 1219.2 mm) The 3M Trizact Cloth Belt 237AA uses proprietary microreplication technology where micron-graded aluminum oxide particles are formed into tiny pyramids of abrasive mineral and then coated on an X-weight cloth backingAs these pyramids wear, fresh, sharp mineral is continually exposed to produce a consistent cut and a predictable, fine finish. Product Information Brand 3M Part # 7000139281 Line Trizact Grit 16 Length 24 Inch Width 4 Inch Material 237AA Mineral Aluminum Oxide Origin Country USA Product Type Regular Sanding Sheets Product InformationFlexible backing for consistent finish over contoursFor intermediate finishing and fine polishing prior to plating or buffingProduces a fine finishSelf-sharpening pyramids start sharp, stay sharp, and run cool