Extend the Growing Period of Your Plants! Our large walk-in tunnel greenhouse measures 400 x 300 x 200 cm (L x W x H), providing a personal plant nursery for your garden. And walk-in design provides enough space for plant growth while allowing you to water and cultivate plants easily. The protective cover is crafted of premium PE material, which is sun-protection, bite-proof, and waterproof, helping protect your lovely plants all year round. And the supporting frame is constructed of high-strength galvanized steel, which can effectively prevent damage from snow or rainwater accumulation. To enhance stability, the frame is reinforced by 4 extra brace bars, also you can tighten wind ropes and fix them on the ground firmly with metal pegs, and put stones on the overlong cover. With large screen doors and roll-up mesh windows, it is easy to control the interior temperature while increasing cross airflow.