"With innovative features, quality construction and value, the ShelterLogic GrowIT Organic Growers Pro RoundTop Greenhouse is the ideal tunnel greenhouse for experienced growers. Round frame design with Easy Slide Cross Rail structure made with 1 3/8in. steel with DuPont premium powder-coat finish that resists chipping, peeling, rust and corrosion. Waterproof polyethylene fabric cover has screened vents at both ends and roll-up side panels for increased temperature control and airflow. Center Height in. 96, Color Gray frame, translucent cover, Frame Spacing in. 78, Frame Thickness in. 1 3/8, Frame Type Steel, Glazing Waterproof, UV-treated cover, Length in. 236, Shelves qty. 0, Side Wall Height in. 72, Style Round, Ventilation Adjustable on all four sides, Width in. 120, Dimensions L x W ft. 19 x 10, Outer Material Polyethylene. Round frame design with base rail structure DuPont premium powder-coat finish that resists chipping, peeling, rust and corrosion Polyethylene fabric cover blocks harmful UVA and UVB rays Patent-pending Shelterlogic 3X steel stabilizers deliver a stable, more durable shelter Double zippered front and rear doors with screened vents for increased air circulation Roll-up side vents for air flow and temperature control Easy slide cross rail system locks cover down and squares up frame Temporary auger anchors, hardware kit and easy step-by-step instructions for a greenhouse that ready to build right out of the box"