The semi-professional DIY Palram Americana 12 ft. x 12 ft. with Premium Accessory Package is specially designed for year-round use with the gardener enthusiast and hobbyist in mind with ample headroom (over 8.5’) and all-around space for vegetables, raised garden beds, flower potting benches, hanging plants, and gardening supplies. The Palram Americana 12 ft. x 12 ft. with Premium Accessory Package comes with a strong, rust-resistant, reinforced all-weather proof aluminum frame, plus virtually unbreakable, crystal-clear Polycarbonate panels, and an all-around galvanized, rust resistant steel base, crucial for adding structural support, stability, and alignment. Two vented roof windows allow optimal warmth and humidity for plants to thrive. Hinged, durable locking double doors with a wide opening and a low threshold ramp allow easy access for wheelbarrows, lawnmowers, or wheelchairs. Why Polycarbonate Palram Industries is a well known and respected world leader in Polycarbonate manufacturing. Polycarbonate is a glass-like, virtually unbreakable polymer, making it the perfect material for greenhouses by being a light-weight, crystal-clear panel that provides all the light transmission benefits of glass, without its associated dangers. Maintenance-free, high impact, UV resistant Polycarbonate panels ensure strength and quality, even in harsh weather conditions. At first you may worry about the flexibility and thinness of Palram’s clear Polycarbonate panel used in our greenhouse kits, but rest assured that once assembled, the panels will add to the greenhouse’s rigidity, strength, and resistance to harsh weather conditions. Features: Includes greenhouse, 4 shelf kits, 1 double stage galvanized steel potting bench, 1 automatic vent opener, plant hangers, and 2 roof vents.