This is the 8 x 6 extra tall polycarbonate greenhouse is the ultimate dream building suitable for experienced or beginning gardeners these greenhouses are ultra strong because they are supported by a durable aluminium framing which is powder coated and in evergreen to provide extra stability and strength this aluminium framing keeps the doors and the glazing sturdy as well for better quality the sliding door feature maximises the space for your ease polycarbonate is considered to be strong