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Enjoy the peace of mind that comes with heavy duty security enhancements. The VELUX top-operated, centre-pivot burglary resistant roof window GGU Q is maintenance-free and built with integrated frame locks, extra strong hinges, laminated internal glazing and toughened external glazing which reinforces the window against any potential breakage. Airtight seal for insulation Manually operated power source Enhanced security Noise reduction glass Laminated glazing Rotates 180 degree for easy cleaning Easy to install ThermoTechnology for energy efficiency Durable Suitable for roof pitches 15 - 90 degrees