I was looking for a decent shock mount for Neumann KM184. The quality is really good and the mic sit perfectly in it. Surprisingly high quality... so I bought 5 more! All are mechanically perfect. I gave one star less for one single reason: the elastic band is too strong and I would have preferred a softer one. I did not test on the field, but it definitely would absorb rumbles better with a softer one. You may change it easily. By the way: you can squeeze in a Royer-121 and it is ok, but not ideal. Oktava MKs? NO, not the right diameter, unless you put extra foam in it. Good work.