WHY OUR MODULAR RAISED GARDEN BEDS ARE DIFFERENT 9-in-1 Modular Design: Versatile configurations fit any backyard space Long-Lasting Quality: With Aluzinc coated metal, it lasts 3-7x longer than regular galvanized steel beds, far longer than wooden raised bed gardening kit. Healthier Roots, less bending down: At 17,” it’s the optimal depth for strong root growth. The higher depth also requires less bending down for more comfortable gardening. Easy to Assemble: Building your dream garden is as easy as tightening the fasteners Safety First: Oval design with no sharp corners and a rubber safety strip over the edges No Soil Contamination: Unlike chemical-treated wood or plastic, Aluzinc steel has micro amount of elements leach into soil during its whole life; even if it does, aluminum, zinc and steel are essential elements for soil.