Series:B318t sand discs Backing:velcro/pressure Sensitive Adhesive paper Grit:p80 ... control of the producing sanding belt, self-adhesive sanding discs, leather sand paper, velcro sand paper,during making jumble ... rolls to finished sanding belts, self-adhesive sanding discs, leather sand paper etc., so we guarantee the high ... of our products . OSLONG B318T velcro sand discs(abrasive paper)