The original Kathrein is certainly very good. I have to rely on it, since I do not have even the possibility of properties such as damping behavior etc remeasure (and actually do not want to). Therefore I have consciously Kathrein product ordered to be on the safe side. Get but I had a fake! Recognizable by: light blue dielectric, no funnel shape of the hole for the center conductor, labeled metal body. See also the review of aerial land-net, which describes very well how to recognize the forgery. (Thanks for aerial land!) You can now of course say: Man, what the hell, is just a mass block ..... but does not matter how it is labeled or what color the dielectric ..... True, but: When damping behavior I want really sure be to have a Kathrein quality product instead of a cheap copy. And when I order Kathrein, I want to get even Kathrein.