Flo-N-Gro?s Premium ID (Inside Dimension) Tray is built to provide top-quality performance for your growing needs. Extra thick, heavy-duty, premium, long-lasting plastic tray features an easy-to-clean square pattern that also drains more easily. This 4 ft x 6 ft tray is made of 5 mm material thickness. Built for rigorous use, the tray features heavy-duty design qualities that include gusseting in all necessary areas. Made with a proprietary blend of premium material. Manufactured in North America.