Everything about this greenhouse model is premium! The Juliana Premium 8.3 series greenhouses deliver quality design and construction. The extra strength profiles used in the Juliana Premium make this the strongest hobby greenhouse on the market. Each model includes a locking hinged Dutch door that is 2' 7" wide, all mounting hardware, and two adjustable double window vents. The 8.3 models are available with either 6mm or 10mm twin wall polycarbonate and your choice of a mill finish frame or a green frame. Each model is 9'1"W x 9'9"L x 7'10"H and has 4'5" side walls. Galvanized steel base is included.