The Khaya model, is literally the best horn mute I have ever tried so far!! Really good quality construction, with even sound in all registers, dynamics and articulation, effortless playing and warm sound, unlike any other mutes which have tons of resistance and a bit "squeaky" sound. Also, really stable intonation (I didn't even need to use the tuning needle).Works great with Kruspe horns (Ed. Kruspe, Holton) and also Geyer ones (Alex, Paxman, Yamaha etc)
Totally recommend it!