Simple, low-cost and industrial couplers were developped for use in videocommunication networks. In the beginning, it was the C.N.E.T. (Centre National d'Etudes des Telecommunications) which defined a new technique for the manufacturing of Y couplers with two ports in-one port out. This method uses easy and totally mechanics ways and gives components having most interesting characteristics. Meanwhile, because of the development in french videocommunication, in which there is a great need for multi mono couplers, we , with the help of the C.N.E.T., did find a way for producing such components. The very interesting fact is that we use the same technology to produce mono or multi mono Y couplers. The utilized technique allows large production with good accuracy for both kind of couplers.