Porter-Cable® Drywall Sander Pad, All Purpose Close Coated, For Use with: Porter-Cable® 7800 Drywall Sander, Specifications: 9 in dia, 120 Grit, Medium Grade, 10000 RPM, Aluminum Oxide/Foam, Black. Porter-Cable® 77125 All Purpose Close Coated Drywall Sander Pad with Abrasive Disc, 9 in dia, 120 Grit