This 8' x 12' polycarbonate greenhouse features a rust-proof aluminum frame with dual sliding doors and 4mm twin-wall panels that provide superior insulation, 99% UV protection, and optimal light diffusion for year-round gardening, complete with 5-level adjustable windows for ...This 8' x 12' polycarbonate greenhouse features a rust-proof aluminum frame with dual sliding doors and 4mm twin-wall panels that provide superior insulation, 99% UV protection, and optimal light diffusion for year-round gardening, complete with 5-level adjustable windows for perfect climate control.roof style:Reverse Apex, panel type:Light Diffusing Panels, panel material:Polycarbonate, panel thickness:4mm, panel thickness:Double Pane, doors included:Yes, door type:Sliding; Lockable, number of doors:2, ventilation included:Yes, ventilation location:Roof Vent, foundation included:No, foundation needed:No, planter included:No, drainage type:Open-bottom, portable:Yes, foldable:No, durability:Weather Resistant; Water Resistant; Rust Resistant; Scratch Resistant, snow load capacity:40 lb., door height:75 Inch, number of vents and windows:2, wind rating:30-40 mph, dimensions:12 x 7.9 x 7.5 ft