The ArtBin Paint Storage Tray is designed with twenty-one 1.5-inch square openings to hold a variety of art and craft supplies. Openings are perfectly sized to hold 4-fluid ounce paint bottles. In addition to being wall mountable, this tray can sit on a desk or fit into the brand’s Semi Satchel 6925AB. Two trays fit into the Super Satchel Double Deep 6990AB. It has a stylish and sturdy MDF construction with a white gloss paint finish.