It's an aluminium mute, very light and durable. I have always one in my bag because it's cheaper and standard. Many conductors, composers or producer ask for this specific model.
Cheap but with great quality, Denis Wick knows how to build a mute. It's the best standard straight mute and will fit well on every genre.
I used it on symphonic music, operas, jazz and pop recordings.
It doesn't affect the pitch in any way (while other, more tight mutes, can rise the pitch).
Flow stability and compression are just lightly affected, not even noticeable after some minutes of playing.
It's light and don't tire the player.
The corks are glued to the body and could easily get taken off. Any super glue that works on aluminium will fix a fallen cork.