Broadband directional coupler box for loop-through systems in BK, GA and satellite house distribution systems. Suitable for flush-mounted boxes with a diameter of 55-65 mm. With claw and screw fastening. To be completed with: Central plate for antenna sockets System M 2967.., 2975.., System M MEG4122-03.. /-04.., System Design MEG4123-60.., System Area 2941..