Trumcor Super Stealth Trumpet Practice Mute Fiber and Wood Construction TrumCor mutes are carefully hand-crafted with wood and a specially formulated resonant fiber material They create a muted tone that is vibrant, warm and responsive These mutes are durable, and the wide selection of sizes ensures a proper fit and excellent intonation TrumCor mutes produce a beautiful sound, and at the same time preserve the pure timbre of the trumpet in all registers and dynamicsSuper Stealth Like the Lyric Stealth, the Super Stealth has an even even response in all registers