Gator Sanding Disc 20-Pack 6-in W x 6-in L 80-Grit Commercial Stick-on Sanding Disc Sandpaper. Premium discs are designed for power tool sanding and fit any 6 In. back-up pad. Gator Medium 80-Grit Disc Sandpaper 6-in W x 6-in L 20-Pack Item #195743 Model #3245