Made from reclaimed scaffolding and truss. I designed these planters specifically to withstand the elements, to have replaceable parts, and to fit a thermoplastic liner inside. The side slats all slide freely along an aluminum track that is inlayed into the 3"x4 " truss legs. A waterproof coating will protect from weather. Inside dimension: 24"x24"x24". Outside dimensions 32"x32"x32".