Grower's Edge? High Stakes? Heavy Duty Tomato Cages are great for supporting tomatoes, climbing plants and top heavy foliar plants. These tomato cages are constructed of heavy duty galvanized steel that will last for many seasons. Stackable for off season storage. Wire thickness is 9 gauge (9/64 in) (0.145 in). Each cage is designed with 4 rings and 4 supporting legs for added support and stability. Top ring diameter is 13.5 in.