Crossover clamp 90°. Used for long tube intersections with uprights where decreasing cutting cost and increasing strength of the system with continuity of the tube is desired.
Another big plus of the black coating is, that the color gets into the material really deeply, which prevents the connectors from corroding. The paintwork is not resistant to UV radiation and is therefore not suitable for outdoor use. The tube fittings are equipped with black-colored stainless steel adjusting screws with cutting edge.