Shopsmith  Aluminum Oxide  Sanding Sheet *Length: 5-1/2 in. *Width: 4-1/2 in. *Grit: 220 Grit *Grit Type: Fine *Material: Aluminum Oxide *Product Type: 1/4 Sheet Sandpaper *Number in Package: 5 pk *Recommended Surface: Multi-Surface *Wet or Dry: Dry