The Tunnel Greenhouse from Steelmates NZ is composed of 140g/m² polyethylene cover, which allows natural light to be evenly distributed, It also prevents up to 99.9% of harmful UV rays from penetrating the cover. The side windows and rolled-up doors formulate a good ventilation system, which provides an ideal climate for growing plants by protecting them during winter and boosting growth during the summer months. The Tunnel Greenhouse NZ also has a large doorway, you can easily get in and out, even when carrying garden tools.