... it’s a upgrade product from manual roller shutter. Reelpipe is high quality aluminum alloy material, high strength, difficult to ... -aging,corrosion preventive. According to the height of roller shutter, reelpipe diameter can be choosed 50mm, 70mm, 80mm ... .Structure Diagram More Information Type: Roller Shutter, Curtains, Blinds Brand: Boosly Frame Material: Aluminum Alloy Blind: sunscreen, blackout etc ...