Palram Nature Series Mythos Hobby Greenhouse - 6' x 6' x 7', Silver Virtually unbreakable 4 mm twin-wall polycarbonate panels block up to 99.9% of UV rays and diffuse sun light eliminating the risk of plant burn and shade areas Rust resistant aluminum frame with 36 sq. feet of growing space Includes adjustable roof vent, rain gutters, lockable door handle with magnetic door catch and a galvanized steel base for structural support 5 year limited warranty and US based customer support The Nature Series works with Palram' s line of hobby greenhouse accessories to maximize space and a more productive growing season