This Stonedlined Practice Mute for Flugelhorn is both durable and inexpensive. Also referred to as the Mannie Klein "Sh! Sh!" practice mute. "Practice anywhere-in a hotel room, motel room, studio or band room-even in the same house where a baby is sleeping. Disturb no one. Free easy blowing. No resistance in all registers. No one hears you but yourself. Yes, practice anywhere, anytime." -Humes and Berg. Made in the USA.