Flush-mounted electronic box with side terminal space, square shape, for use in masonry with an installation depth of at least 50 mm. . Connection piece with bayonet lock that can be coupled on both sides. 10 combination pipe entries 20 and 25 mm. 2 entries up to 20 mm in the floor. 4 entries for flat cables/ribbed cables. 4 x 3 screw domes