3M™ Paper Belt 364UZ, 80 F-weight, 43 in x 79 in, Sine-lok, Full-flex

3M™ Paper Belt 346UZ is constructed with a premium aluminum oxide mineral. It is an open coat construction for loading resistance and is coated on an F-weight paper backing to efficiently sand and finish. F-weight is one of the heaviest, most rigid paper backings available and will achieve finer finishes than cloth backed belts in the same grade.