The Jo-Ral TPT-3 Tri-Tone trumpet cup mute creates an exciting tonal quality that results in near-perfect intonation. Jo-Ral TPT-3 Tri-Tone mutes are made of spun aluminum and have been tested to perform evenly in all registers. Many models are also available with brass bottoms-offering a slightly warmer moderately dark sound or with copper bottoms which produce an even warmer darker rich sound. Three distinctive sounds from a single mute—that s what the Jo-Ral TPT-3 Tri-Tone mute delivers. Specifically designed to provide exceptional versatility in artistic expression this all-aluminum mute includes two felt rings that can be inserted to create different sounds. With one felt ring inserted the result is a softer less brilliant sound than the mute alone provides. With both rings inserted the sound is softened even further.