This is the spacious 14 x 8 extra tall polycarbonate greenhouse which is reinforced by a sturdy evergreen powder coated aluminium frame for ultra durability and longevity to maximise the area within the greenhouse we have incorporated sliding double doors that help in moving larger plants or furniture polycarbonate is used because it is a resilient material unlike glass and doesnt shatter as easily as glass either to make sure that your plants grow in a healthy environment without the u