The ArtBin Paint Storage Tray is designed with twenty one 1.5-inch square openings hold a variety of arts and crafts supplies. Openings are perfectly sized to hold 4-ounce craft paint bottles. The tray is designed so that you can see your paints all at once and easily access them. In addition to being wall mountable, this item can sit on a desk or fit into ArtBin Super Satchel System Products. One tray fits inside of the Semi Satchel (6925AB) and two trays fit into the Super Satchel Double Deep (6990AB).