This concealed tilt & turn window system allows windows to tilt for airflow and turn to be cleaned from inside or used as a fire escape. It can accommodate sashes up to 1400mm wide and 2300mm high, covering most applications. The gearing supporting up to 100kg is made of high-grade corrosion-resistant steel to comply with European standards. An aluminum water bar is also recommended to strengthen the seal and drain any water ingress.