Solidly built greenhouse fan only complete with installation and fixing materials. Bio Green Arizona Greenhouse Fan features Designed to hang from the greenhouse structure. All stainless steel construction for long life in damp greenhouse environments. High quality German manufacturer. Dimensions Length 180mm , Diameter 215mm Powerful fan for even distribution. Large quantity of air moving slowly for effective circulation. Fan motor designed for continuous operation 24 hrs. per day 365 days a year. Low power consumption fan only 29w. For more information on Bio Green Arizona Fans and greenhouse ventilation call us and speak to one of our Greenhouse specialists who will be happy to assist you in your purchase.