STRONG & STURDY: Wall mounting brackets included for added strength and safety. Each shelf holds up to 200 lbs. when mounted. STABLE: Feet height can be adjusted for added stability on uneven surfaces EASY ASSEMBLY: No tools required to assemble SPACE SAVER: Maximize garage, home, or shed space with 4 tiers of storage TRUE HEAVY DUTY: This product is almost twice as heavy as other plastic shelving units. What you get is a 30 lb solid structure shelving unit holding 30% more weight than other plastic shelving units MADE IN USA: Engineered with fully sustainable recycled material. Shelf outside dimensions: 20”D x 48”W x 55”H