ShelterLogic GrowIT Round Raised Bed Greenhouse, 4 x 4 x 2 ft. 1 in. / 2,5 cm high-grade steel frame with Premium powder coat finish resists chipping, peeling, rust and corrosion Triple-layer, heat bonded ripstop translucent cover is waterproof and UV-treated inside and out Roll-up cover provides airflow and temperature control or fully enclosed position The GrowIT fabric is a good thermal barrier providing good insulation for plants while preventing over-heating, which requires less water, ventilation accessories, and attention Wood Frame Not Included. Quick and easy assembly with simple step-by-step instructions