Fiber optic connection box for cable ducts with couplings, equipped with 1x LC-Q, 1x SC-D, and 1x ST-D couplings. The alignment direction is tilted 45º downward and is designed for fiber optic couplings with flange mounting (no clips). It provides a load-free, protected positioning of the fiber optic connectors in the cable duct as well as strain relief with cable ties. The central piece measures 50 x 50 mm according to DIN 41075 Part 1:1989 and includes a viewing window for an integrated labeling insert. It meets the bending radii of more than 20 mm for fiber optic cables when used with a mounting bracket and is suitable for pre-terminated cables or the installation of connectors on-site. The standard color is pure white RAL 9010, with variants such as 1x LC-Q, 1x SC-D, and 1x ST-D.