Faxx (USA) Aluminium Trumpet Straight Mute
 
These mutes are very popular in the USA and slowly gaining ground in Europe and the UK.  Faxx offer a comprehensive range of Mutes for all Brass Instruments.  This mute has a great straight mute sound and good intonation, which can be a problem with some cheaper mutes.
 
Faxx say "The Faxx mute’s unique design helps a player produce the sound and projection needed without compromising intonation of sound quality. Faxx mutes are provided in metal for the advanced player."
 
Made in the USA - not China.