The mounting box is designed for installation in all kind of wall materials, e.g. hollow walls and stone based materials. The box has 2 fixed inlets for Ø 20 conduits. There are also 3 knock-out on the side, and 2 on the bottom. Made of halogen free material (IEC/61249-2-21) and fulfills the requirements of the glow wire test according to the standard IEC/EN60670: 2005 (850 °C).