The A290 Fine Grit Paper Vacuum Disc combines a P-grade aluminum oxide abrasive for exceptional durability and fast cutting action with a flexible, saturated fiber-reinforced C-weight latex backing for added strength. The open layer, water-based stearate coating and vacuum holes help resist loading to ensure durability. Select the A290 vacuum disc for dry sanding and fine-grit finishing applications involving aluminum, composites, fiberglass and wood. For convenient installation and removal, the disc features a Velcro backing.