The 3M Paper Drywall Sheets are designed for sanding drywall joint compounds (light or regular), patching compounds, and plaster. They are made with aluminum oxide, a tough synthetic mineral that cuts cleanly and leaves a smooth finish. The grit is 150C.
3M 99431, Drywall Sanding Sheet 99431NA, 4-3/16 in x 11-1/4 in, 150 Grit, 7000047933, 25 sheets/pack
$7.52
Factory Stock, 7-10 Day Leadtime, Priced Per Pack
3M Drywall Sheets are designed for sanding drywall joints, patching compounds and plaster. Made with sharp synthetic mineral for long-lasting performance. Pre-cut 4-3/16 in x 11-1/4 in and die-cut to fit most drywall sanding tools.

Dynabrade 78591 3/8" Dia. x 1" W x 1/8" Center Hole, 80 Grit, 100/pack
3M 26122, PPS Series 2.0 Cup, Midi (13.5 fl oz, 400 mL), 7100135960, 2 per carton
3M 22394, Roloc Disc 361F, 50 YF-weight, TR, 3 in, Die R300V, 7000045096
3M 19770, Utility Cloth Sheet 314D, 9 in x 11 in P120 J-weight, 7000000358 
