ALEKO VISCIDDISK690E/F/L/D Backing Pad for Drywall Sander Models 690D 690E 690F 690L 14.5 x 11 x 1 Inches Use ALEKOs backing pad to keep your sandpaper disc in place while you use your sander Hook-and-loop mounting is cleaner than adhesive, with no sticky mess to clean up afterward Works with ALEKO brand model 690D 690E 690F and 690L drywall sanders, sold separately If your sander is attached to a shop vac or has a built-in vacuum, the holes in the disc will line up with the holes in the sandpaper to help keep your work area clean and dust-free Product dimensions 14.5 X 11 x 1 inches