20x10x7ft white greenhouse with 8 roll-up windows & 1 roll-up zippered door allows for cross ventilation and climate control, ideal to extend growing season and protect plants. With durable and transparent PE plastic cover, greenhouses protect plants while allowing nourishing sunlight to pass through. HR-GH-4G-W Equipped with 8 slant bracing tubes, a front cross bar, and middle reinforced tubes, tunnel greenhouses have enhanced stability. Easy to assemble.