The box is mentioned for flat socket outlet ( for example 302EUJT ) installations with the flexible pipe. There is six knock outs for 16 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 two red half circles enabling installation on boards with a thickness of 12- 26 mm. 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).