... , it’s a upgrade product from manual roller shutter. Reelpipe is high quality aluminum alloy material, high strength, difficult to deform, ... height of roller shutter, reelpipe diameter can be choosed 50mm, 70mm, 80mm or 110mm, underbeam made by white paint luxurious ... heavy rail, top-grade quality. Bracket chooses white paint high strength alloy steel, strong anti-bending and anti-shearing, ...