Spacious gardening, the extra tall Balance greenhouse gives plenty of room to enjoy growing. The greenhouse features rust resistant strong aluminium frame, 4 foot wide extra tall double doors, with low threshold entry for wheelbarrows and improved easy access. The greenhouse has a merged glazing system - twin wall polycarbonate on the roof and the unique crystal clear unbreakable polycarbonate round the sides. The twin wall polycarbonate roof defuses the light during mid-day for protection from direct sunlight and gives extra insolation on the hottest part of the greenhouse â€“ the top. The clear side glazing looks like glass and allows you to enjoy the greenhouse from outside while giving a light transmission of over 90%. The polycarbonate glazing is lightweight, virtually unbreakable and has no sharp edges. These features create a safe environment for the whole family.The greenhouse also comes with two vents and base included with easy to follow assembly instructions.