In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. The Trumcor mutes are carefully handcrafted with wood and a specially formulated resonant fiber material. These are durable mutes that are designed to produce an in-tune, vibrant, warm and responsive sound that blends well with other instruments. The Super Stealth practice mute is ultra-soft and not quite as free blowing as the Stealth.