Palram Bella Hobby Greenhouse, 8' x 12', Silver with Twin Wall Glazing Virtually unbreakable 6 mm twin-wall polycarbonate panels block up to 99.9% of UV rays, create even-light and maintain ideal temperatures Rust resistant bell shaped frame designed for increased wind resistance and reduced snow build-up 96 sq. ft. of growing space and 7' of head room in the peak Includes adjustable roof vent, lockable door handle and galvanized steel base for structural support 5 Year Limited Warranty