AUS74.2 is a front-mounted mounting box with a telescopic bottom part for walls of 1–3 plasterboards (wall thickness 9–39 mm). Due to the telescopic bottom part, the depth of the box can be adjusted between 54mm and 70 mm. Mounting hole diameter 73–74 mm (normal box drill). The protection rating of the box is IP3X. Made from halogen-free material (IEC/61249-2-21) and fulfills the requirements of the glow wire test according to the IEC/EN 60670 standard: 2005 (850 °C).