Indoor roller blind without box designed for big dimensions (max 3200 x 3200 mm). Shaped extruded aluminum side brackets . Operated by mechanical limit stops motor 230V 50Hz or crank handle. Galvanized steel roller Ø85 mm. Fabric is flame-retardant C1 – M1 – B1 class certified and should be fiber glass or polyester. Depending on the dimension needed and fabric width, there could be horizontal seams and stainless steel reinforcement rods. The extruded aluminum hem bar can have different size and shape (cylindrical, square, etc.) with an inside weight ballast. All aluminum parts will be painted according to the RAL chart.