Clear, lidded palette seals tempera airtight to prevent drying out. Place a strip of moistened sponge in the Lockbox to keep paint moist for months. Comes with 6 tempera cakes: black, blue, green, red, white and yellow; each measures 11-5/8" in diameter. Includes a plastic palette insert with 12 mixing wells and six wells for holding tempera cakes. Refill cakes and replacement palette insert sold separately.