Jo-Ral TPT-3 (TPT3) Trumpet Tritone Cup Mute The Joralmut was designed after extensive testing by some of the music industry's most distinguished experts, based on their valuable suggestions, and is used by top brass players around the world in all genres, from orchestras to jazz studio players. ■Made of high quality hand-spun aluminum. ■Variations in tone depending on the material of the base All aluminum...bright and sparkling tone. Multi-purpose. ■The cork pad is made from a mixture of neoprene rubber and cork, which is highly water-resistant and durable. The pads are flexible and responsive, maintaining a moderate level of humidity, providing excellent grip. There's no need to worry about it becoming brittle, crumbling, or peeling off due to drying. ■Comes with a felt pad to be attached inside the cup