The Magnum Greenhouse Kit from Halls incorporates cast aluminum joints at both ridge and eave connections and a box-section Ridge Beam. All the Magnum Greenhouse Kits on this page come with: Strong Twin-Wall Polycarbonate glazing, Double doors for increased accessibility Extra height at both the eaves and ridge. Glass units are not available on this web page however you can purchase the Magnum Greenhouse Kit as "Frame Only" just by giving us a call. The "Frame only" Greenhouse Kit comes with everything you will need except the glass which you can buy at your local glass shop. Growing areas range from 72ft - 117ft (square). The Halls Magnum Greenhouse Kit is a smart choice for the keen and serious hobby gardener!! Don't forget to add a steel base if you need even more height and also, check out our greenhouse accessories!!! The Magnum Greenhouse Kit is a great Value!!