The Sigma 20 greenhouse from DivetoGarden is a spacious and durable greenhouse designed to provide optimal growing conditions for your plants. The Sigma 20 greenhouse features a sturdy aluminum frame that is resistant to rust and corrosion, ensuring long-lasting performance. The frame is also powder-coated for added durability and protection against the elements. It is covered with 4mm twin-wall polycarbonate panels, which provide insulation and UV protection. The Sigma 20 greenhouse has a generous interior space of 19.7 square meters, allowing for plenty of room to grow a wide variety of plants. Sigma 20 greenhouse include roof vents for improved air circulation, a rain gutter system for efficient water drainage, and a base frame for added stability.