This handy little package has 5 different grits of sandpaper: 150, 240, 320, 400, and 600. Each grit is in a 1" wide by 20 foot long roll of J-Weight cloth backed sandpaper. Great size for pen making. The grit in the sandpaper rolls are aluminum oxide. Replacement rolls can be purchased separately along with an 800 grit. Search for Sandpaper Rolls.