The P421 device junction box can be used as a ceiling box and as an electronics box. The concrete box is suitable for installation in in-situ concrete or in precast concrete plants. Can be used with or without wings, the P421 universal box offers more clamping space and also makes it particularly easy to punch out the pipe holes. Particularly practical: The junction box can be installed extremely quickly (quick installation) and can be used universally for pipes, cables and lines. Everything integrated in just one box, the ceiling junction box can be used as a device box, a device junction box and a lighting box.