Preserve acrylics, oils, watercolors and tempera and keep them fresh and pliable between painting sessions. The tops of these 11-1/2 x 1 thick palettes lock in position with a secure slide fastener. Available with a 24-well plastic insert or a 6-well plastic insert that holds 6 round tempera cakes. With wet sponge strips in place, paint won t dry out and can stay usable for weeks, helping to eliminate wasted paint. Sold Individually. Preserve and protect your paint between painting sessions. Top features a unique locking closure. With included wet sponge strips in place, paints stay moist and usable. Perfect for acrylics, watercolors, temperas, oils and gouache.