Sturdy frame: Reinforced by 25mm galvanised steel. Purchase options: Choose between a 6x6ft frame and an 8x8ft frame. Waterproof & UV treated: The frame features a waterproof and UV treated design both inside and out! Garden: Get a heavy duty PE greenhouse. Material: Constructed from 200gsm triple layered woven PE. Air flow system: Complete with netted windows and sides that roll up to help regulate the temperature inside.