80 GRIT SAND PAPER / INDUSTRIAL FLOOR SANDER . I have 20 sheets of sand paper to fit an industrial floor sander. The paper is 8" wide and 18 3/4" long. the sheets are cut at a slant with 3 cuts on each end. The back of the paper is stamped C80 E454 13 FLOOR PAPER. There are 10 sheets in plastic and 10 sheets loose that are dusty from setting on shelf. Although they are new they are not excellent because of being dusty.