Liberty aluminum mutes are known for their high quality craftsmanship and materials, excellent playability, while being value priced. Straight Liberty Aluminum Tenor Trombone Mutes produce a rich full open sound and do not distort pitch. - the manufacturer
This mute is appropriate for large bore instruments—those with 8.5 or 9 inch bell diameters (20.8 - 22.cm). For instruments with smaller bells, use item 100816. Weighs 5.6 ounces (0.16 kg) -cdp