Vego Garden 17 inch tall 6 in 1 metal garden raised bed is designed for urban gardening with its optimized size for a small medium backyard. No soil contamination unlike treated wood or plastic, aluzinc steel contains only micro amounts of harmless elements that may pass into soil during the bed's lifetime. Safety firs the oval design with no sharp corners, and the heavy duty rubber safety strip provide superior protection from injury. Healthier roots the higher depth of our extra tall beds allows for plenty of room to grow a myriad of plants and vegetables. Which will flourish due to the ample space for root systems to develop and more easily drain water.