A wonderful way to mix and store your paints! The Lockbox Palette seals airtight to prevent any painting media from drying out. Cut a strip of sponge, moisten it, then put it in the center of the Lockbox before closing it to keep paint moist for many months. The Lockbox comes with a 24-well plastic palette insert that is excellent for any kind of water-based paint such as acrylics, watercolors, liquid tempera and more. 11-5/8" diameter. Oil painting sheets and replacement palette insert sold separately.