The box supports are compatible with the mounting boxes AU3.2, AU3.24, AU5.2, AU17 and junction box AU19. The supports are used for the installation of boxes into hollow walls and roofs, with frame thickness 42, 45, 66, 70, 90 and 95 mm. It is possible to mount an inlet or a strain-relief on the support. Made of halogen free material (IEC/61249-2-21).