Galvanized Steel, Double-Layer Anti-Corrosion:;0.5mm galvanized metal with 1.8mm overlap and oval design resists pressure and rust for lasting durability.Open Bottom for Healthy Roots:;Open-base design prevents water pooling, protects roots, and enhances nutrient absorption.Large 4.5×2×1ft Space, Rubber Edge:;Spacious 4.5x2x1ft raised bed with reinforced rubber edging prevents injury and holds plenty of soil.Stable & Thickened Construction:;Screw-fastened edges and thick steel ensure super stability—no deformation under heavy soil.Tool-Free, Quick Assembly:;Butterfly nuts and included hardware allow fast, tool-free setup for gardens, patios, and greenhouses.