The A290 fine grit paper H&L vacuum disc combines a P-graded aluminum oxide abrasive for outstanding durability and fast cut action with a fiber-reinforced, flexible C-weight latex-saturated backing that for strength. The open coat, water-based stearate No-Fil coating and vacuum holes help resist loading to ensure durability. Select the A290 vacuum disc for fine grit dry sanding and finishing applications involving aluminum, composites, fiberglass and wood. For convenient installation and removal, the disc features a hook and loop back.