For soundproof walls, also for installation directly opposite one another, from wall thickness 100 mm, can be combined with each other and with the device junction box, for panel thicknesses up to: 40 mm, 4 cable entries up to Ø 11.5 mm, 2 pipe entries up to M25, connecting pieces per PU: 5, dimensions (D x Ø): 49 x 68 mm