Features: 1. Fit all type trumpets 2. It produces the type of sound that is considered the "standard" in cup mutes, for most jazz musicians 3. Made of excellent aluminum, durable for use 4. Material: Aluminum 5. Length: 13.5 cm 6. Diameter of Small End: 2 cm 7. Diameter of Larger End: 5.8 cm Package Includes: 1 x Trumpet Mute