This frame of this practical greenhouse is built from superior aluminium, which lays the foundation of the upright and sturdy structure. The polycarbonate-made panels are semi-transparent, which allow you to check on the plants from time to time. To make sure that the internal conditions are optimal, the greenhouse is paired with a window opening. An impressive greenhouse for a planting lover like you. Features: Superior Aluminium: The greenhouse is strong, resistant to rust and corrosion. Smooth Sliding Door: Closing the door is soft and quiet. Gardening becomes more pleasant. Apex Roof: The rainwater can slide down easily and prevent the roof from rusting. Roof Vent: There is 1 window opening on the roof, which provide scientific air and heat flow for the plants. Spacious Growing Space: The greenhouse is large enough for you to plan your planting. Living and Home 6 x 6 ft Polycarbonate Garden Greenhouse, Large Walk-in Greenhouse w/ Sliding Door & Ventilation Window, Green House w/ Aluminum