1-Roof Open Greenhouse 2-Fixed Roof to save cost for ventilation 3-All structure galvanized. 4-Economy and easy assembly! Roof Open Greenhouse This type with Fixed Roof Vent.better natural ventilation.It is a good choice if your place is hot and wind not strong. SpecificationDataSpan Width8m~10mSpan QuantityFor you optionLengthAny length, for you optionSection1m, 1.5m,2.0m, for you optionWall ...