The box is mentioned for the installations with the flexible pipe. There is six knock outs for 16/20 mm pipes and two for the 20 mm pipe. In the bottom there is two knock outs for the bottom inlets. The mounting box includes a rotating, steplessly adjustable extension ring with two locking wings and two red half circles enabling installation on boards with a thickness of 12- 39 mm. The minimum installation depht is 45 mm and overall height 58-73 mm. The box includes a metal struss fixture. 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).