3M SandBlaster Sandpaper No-SlipGrip 9x11 *Sub Brand: SandBlaster *Sandpaper Type: Sharp Synthetic Mineral *Product Type: Sandpaper *Sheet Length: 11 in. *Sheet Width: 9 in. *Grit: 400 Grit *Grit Type: Ultra Fine *Number in Package: 4 pk *Usage: Finishes *Wet or Dry: Wet or Dry *Can be used on a wide range of surfaces including paint, wood, metal, plastic and fiberglass *Special coating to resist clogging *Sand up to 10X faster and lasts up to 10X longer than conventional abrasives of comparable grits *Discovery SUP