Air remains the best insulator for cables. It allows low capacitance and low losses. With the air helix structure of the reference NF-2404, we are closer to pure air insulation than ever before. Just as important as the insulation is a homogeneous structure. This means that the conductors and the shielding must maintain precisely defined distances to one another. To meet these requirements, we have developed a special clip. Strung together in the interior of the cable, several of such clips form the supporting frame that holds the two symmetrically arranged conductors in a helix-shape in the air while keeping the shielding at the exact distance.