Connection unit for installation in device inserts in the underfloor area for individual modules in keystone design, suitable for underfloor device inserts from OBO Bettermann (Ackermann) and individual types from :hager (Electraplan Solutions), design GB3, including module carrier for keystone modules, cover caps and blank covers, plug-in direction of the modules inclined 45° upwards, with viewing window for enclosed label insert, label sheet 209 x 294 mm see accessories, integrated dust protection flaps (also available in color), color: device cup black, cover parts pearl white, variants: 3 port, 6 port, 9 port, 12 port