Mounting bracket for easy and space-saving installation of the connection boxes in parapet ducts to comply with the bending radii required for copper and fiber optic data cables. Support rail fastening, horizontal 55.0 mm, compatible with: OBO Rehau Signa Base and comparable manufacturers, variants: 50.0 mm white, 50.0 mm white with separating shell, 52.0 mm black, 52.0 mm black with separating shell, 55.0 mm black, 55.0 mm black with separating shell