Made from impact resistant polypropylene that is fully recyclable. Stackable. Double reinforced base and corners. Protects from dust and moisture. Clip-lock clamps securely lock the lid. 100% BPA free. Set includes: 1 x 18.5 L (12.6 x 7.9 x 11 in. H.), 1 x 10 L (13.4 in x 8.5 x 5.5 in. H.), 2 x 5.5 L (10.6 x 16.1 x 4.5 in. H.)and 1 x organization tray.