Joint connectors, with flat plugs 6.3 mm for the additional connection of potential equalization cables, connect the duct bases/fittings electrically and mechanically in one operation, can be used in the side parts of the cable protection ducts, the potential equalization is inevitably carried out when inserted.certified! for cable protection ducts: LLK... / LUK... with 40 mm height and their fittings Length L (approx. dimension): 80 mm Material: Steel, strip galvanized in accordance with DIN EN 10346 Required: 2 pieces per joint