Two-part design: Planter box is formed of bottom raised garden bed and removable roof. Use together for maximum growing power, or separately for extra growing space.Steel base: Coated for extra protection, the metal raised bed creates a protective fence around plants. Open bottom ensures direct contact with soil for maximum growing potential.Thick plastic top: Polycarbonate panels create a safe shelter from above. Also contains heat inside. Can be taken off - use with the bottom planter or separately.Top windows: Two on one side, one on the other side. Easy to open and close. Allows air inside this garden planter.Dimensions: 57.5/67.5H x 126W x 107Dcm. Base: 29.5H x 126L x 107Wcm. Top: 30/40H x 120 x 100cm. Assembly required.