You'll love spending time amongst green plants, colorful flowers, and fresh produce with the Palram Nature Greenhouse - Twin-Wall - Mythos Series. This greenhouse features clear, twin-wall polycarbonate panels which not only provides excellent heat retention, but also diffuses the light evenly to help your plants grow. The panels are 100% UV-resistant and virtually unbreakable so you can rest assured that your plants are safe. The aluminum frame is sturdy, durable, and rust resistant. The roof vent is adjustable and provides excellent ventilation so you can be assured that your plants are in a healthy environment while the downspout gives you the chance to collect rainwater to help save water. The galvanized base kit gives you an easy way to anchor your greenhouse to your wood or concrete foundation so you won't have to worry about where to place your greenhouse. Additional Features Extend the growing season by several months Twin-wall panels are virtually unbreakable Downspout allows you to collect rainwater Your choice of frame color Assembles in 4 to 5 hours Limited 5 year warranty Twin-wall polycarbonate panels are 100% UV protected. Rust resistant aluminum frame. Base kit allows you to anchor your greenhouse. Adjustable roof vent provides excellent ventilation. Multiple sizes available.