Excellent Air Ventilation: With 6 mesh windows, our tunnel greenhouse can keep out small "annoyances" and increase cross ventilation and airflow. Moreover, we have a roll-up zipped door for air to freely enter and exit. Keep your space clear of debris and make sure every breath you take is one to remember. Upgraded Galvanized Frame: We upgraded he galvanized steel to 0.8" diameter and 0.02" thickness. This high tunnel greenhouse has 3 top beams to prevent rain and snow buildup on the dome. Moreover, the diagonal poles can ensure stability during extreme weather. We have got you covered, so get ready to see your crops grow all year round. High-Quality Waterproof PE: The walk-in tunnel greenhouse comes with a PE cover, which can protect your plants from ultraviolet rays, rust, snow, and rain all year round. The size of the cover fits the frame closely, enhancing the warmth and wind resistance in winter.

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