Polycarbonate Greenhouse twin-wall translucent PC panels UV protection 99.99%, perfect for raising seedlings or heat-loving plants. Upgraded 5.2 ft wall height, easy to access, and no need to bend over. What's Included? 1 Door(s) Mounting/Anchor Kit Ventilation Features Walk-in Greenhouse for better ventilation: Keep both 2 swing doors (with door hook) and 4 four-level adjustable roof vents open can let in more fresh air while managing excess moisture for the backyard greenhouse Solid material & foundation: The heavy-duty greenhouse has a rust-resistant aluminum frame (1.5mm). 4 corner posts & 2 middle posts help bury the greenhouse deep in soil or concrete for extra stability. Wind rating: 60 mph; snow load capacity: 18 PSF. Built-in drainage rain collection device: Garden greenhouse update 4 corners have drainage holes and attached pipes to collect and drain water, convenient for connecting rain barrels and maximizing the use of water resources. Installation tip: 3 DIY enthusiasts can erect this winter greenhouse kit in 12 hours. Please use a box to hold screws and small accessories in case of missing.