This walk-in tunnel greenhouse provides excellent air ventilation and temperature control with dual-zippered screen doors and eight side windows, ensuring warm, healthy airflow for your plants. Its reinforced 140 g/m² waterproof PE grid cover offers year-round protection against UV rays, rust, snow, and rain while fitting tightly to the frame for improved warmth and wind resistance. Built with an upgraded galvanized steel frame and a spacious 14.60 × 6.36 × 6.30 ft interior, it creates an ideal growing environment for vegetables, flowers, and year-round gardening.Features: Enhanced Air Ventilation & Temperature Control – Dual-zippered screen doors and 8 side windows regulate airflow, maintain warmth, and provide optimal air circulation for healthy plant growth.Reinforced 140 g/m² PE Canopy – Waterproof, UV-resistant, odorless, and designed to protect plants from snow, rain, and harsh weather all year round.Upgraded Galvanized Steel Frame – Made with a heavy-duty galvanized finish, plus cross bars and 4 reinforced diagonal bars for added stability and durability.Spacious Walk-In Design – Large 14.60 × 6.36 × 6.30 ft interior offers ample room for flowers, vegetables, sprouting plants, and easy daily care.Secure, Tight-Fitting Cover – PE canopy fits the frame closely to enhance warmth retention and wind resistance.Versatile for Many Settings – Suitable for home gardens, farms, and small commercial use; effectively extends the planting season for year-round gardening.