it really fits only 19mm mics - I tried mics that are 20, 21 and 22mm - and it is a nightmare to get them into the mount. And if they are 18mm, they just slip thru the mount. Also, the rubber that holds the mics is not such a good quality - after a while it doesnt hold the mics anymore - on one of the mounts, the rubber just collapsed and became floppy so I had to file a return ticket. Great concept overall, the small footprint is really great, but yeah, just too specific and quality is seemingly hit or miss.