Joint connectors, with flat plugs 6.3 mm for the additional connection of potential equalization lines, 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 inevitable when inserted. for cable protection ducts: LLK...E3 / LUK...E3 with 80 mm height and their fittings Length L (approx. dimension): 80 mm Material: stainless steel, material no. 1.4301 Required: 2 pieces per joint