This Jo-Ral Bucket mute is designed for tenor trombones with a 7"-8" bell. The hand spun aluminum construction makes this mute both light and durable. This Bucket fits inside the bell as opposed to the traditional clip-on styles. This facilitates easier mute changes and decreases the chances of scratching your bell flare. The tone of this mute can be changed by subtracting or adding the cotton material inside. Made in the USA.