The Alumilite Mold-It Cast-It Tray Molds set contains 3 flat-bottom molding trays of varying sizes (3 x 3 x 1", 5 x 3 x 1", and 6 x 3 x 1"), making it easy to create custom shallow molds for a variety of projects including custom ornaments, embellishments, game pieces, filigree ...The Alumilite Mold-It Cast-It Tray Molds set contains 3 flat-bottom molding trays of varying sizes (3 x 3 x 1", 5 x 3 x 1", and 6 x 3 x 1"), making it easy to create custom shallow molds for a variety of projects including custom ornaments, embellishments, game pieces, filigree, and more. Not only can this product be used to create custom molds, but it doubles as a mold for resin that produces stunning high-gloss castings. Bring your projects to life with a professional-looking finish.