This 19.4 x 9.7 x 7.4 ft walk-in tunnel greenhouse is built to take a beating from the weather while giving your plants room to spread out. The frame uses thickened galvanized steel poles, 1 inch in diameter with a 0.02 inch wall, reinforced with extra diagonal bars, door poles, U-shaped stakes and tie-downs so it stays upright through rain, snow and strong wind. A 140 g/m² green PE cover wraps the frame with double-stitched, reinforced seams that resist tearing, and the extended cover edges can be buried or weighted down to lock in warmth and humidity. Twelve roll-up windows plus a side-opening swing door keep air moving on warm days, with mesh netting and velcro closures to keep insects and small critters away from your crops. At 74.9 lbs, it holds up to harsh conditions without warping or collapsing, and its generous interior fits multiple shelves for home gardens or small commercial planting.