Roof window with dimensions 55x78 cm Tondach SmartPro. Made of an impregnated wooden frame covered with a three-layer polyurethane coating in white and with external profiles in anthracite-grey aluminum. Central opening axis. Bottom opening handle. Automatic upper ventilation with a capacity of up to 49 m3/h. Quadruple seal. Energy-efficient double glazing with argon. Burglary protection. U of the frame = 1.3W / m2K. U of glass = 1.0W / m2K. Noise insulation - R of the window = 35 dB. Warranty 10 years when using Premium flashing.