Master Palm® Pneumatic.

Master Palm 6” DA Dust Collect Sander Backing Pad, 5/16"-24, 6 Holes

Quality Velcro Face Sanding Pad, Vacuum Type, 6 Hole, Medium Edge for Flat and Curved Surfaces, Rated Operating Speed: 10,000 rpm, 6 in. x 5/16 in. Bio-degradable Pad.