Duct connection unit for accommodating one or two individual modules in keystone design, plug-in direction of the module approx. 30° downwards, strain relief on the module, dust protection flaps, suitable for ducts with 45 mm snap-in fastenings with 4.6 mm snap-in, e.g. GGK parapet duct with 45 mm upper part and M45 built-in devices, OBO Rapid 45-2 and comparable manufacturers, mounting direction horizontal and vertical, color of the cover parts similar to pure white RAL 9010, glossy surface, reference list on request and on the Internet at www.metz-connect.com, variants: 1 port, 2 ports