The joints serve to form the suspended ceiling substructure of the gypsum, the height-offset. The joints exist as a stamped black part of the galvanized steel strip of heat. The special feature of the connectors is an innovative ball sealing at the bottom of the connector, which enables a fastening and thus optimal positioning of profiles securing each other. Ball sealing ensures perfect and secure installation of profiles, with the profile of the ceiling profile being also held against the side bend.