So Clean, So Simple, So Wise Harmony greenhouses merge a smart and clean design to create a simple assembly and improved use. Panels slide into the aluminum frame and are locked without any additional parts. Harmony greenhouses include a galvanized steel base and hinged door. Glazed with Palram's Crystal Clear polycarbonate panels that have unique features that no other glazing materials can supply. Virtually unbreakable “ despite its thinness. Safety “ no glass to shatter or break to endanger chirldren and elderly. Extreme light weight €“ ensure convenient handling, shipping and assembly. Crystal Clear €“ over 90% light transmission for enhanced gardening and aesthetic look.