Four sanding sponges - 5.5 x 4.5 inches. Four different grits - Fine (320-400 grit), Superfine (500-600 grit), Ultrafine (800-1000 grit), and Microfine (1200-1500 grit). I leave it to you to try and remember wether Micro is smaller than Ultra. At least they are labled. Can be used on the greenware (pre-fired) clay or post-fired, on the metal. 1 of each in the package.

(Pack of 4)