Upgraded Heavy-Duty Galvanized Frame: The load-bearing poles of this tunnel greenhouse use reinforced galvanized pipes (Diameter: 1', Wall Thickness: 0.02'), enhancing overall strength and stability. Reinforced door poles, added diagonal bars, U-shaped stakes, and tie-downs increase stability and protect your plants from rain, and strong winds. Thick High-Density PE Cover: This high tunnel greenhouse features a high-quality 140g/m² PE plastic cover that is waterproof, sun-resistant, and insulating, promoting healthy plant growth. The double-stitched seams and reinforced window seams effectively prevent tearing. The extended PE cover edges can be weighted down or buried in soil to enhance insulation, airtightness, humidity, and temperature control. Spacious Walk-In Design: With a spacious 14.60x6.36x6.30 ft area, this walk-in greenhouse tunnel is ideal for growing a variety of plants