Wallace TWC-M19 Studio, practice mute for tenor trombone, made of aluminium, unique concept with a large resonating chamber and adjustable resistance, the M19 plays every note evenly with real centre right down to the pedals, adjust the resistance to your required setting and enjoy playing on this superb mute
Excellent practice mute, and also very useful as a Harmon mute (I even like this sound better than other wah-wah mutes). I tried the Best Brass Harmon, but that one is completely out of tune without the stem. Only disadvantage is the weight, I need an extra counter weight to keep the trombone in balance. But except for that an excellent product.