1: The main frame is made of high-quality aluminum alloy, with strong bearing capacity and light weight. The panel is galvanized steel, and the surface is painted, which is not afraid of wind and sun
2:3 size options, please measure accurately and choose the right size to buy, so as not to waste money and time
3: Accurate size. Two high-quality hydraulic support rods that can easily help you open or close the door
4: For home improvement, industrial, commercial, school, etc. Easy and convenient installation
5: Roof access doors can only be opened and closed from the inside, not from the outside