Length:135mm;Inlet diameter:18.5mm;Outlet diameter: 61mm</br>Fit all type trumpets;this aluminum mute has a nice sound and does not distort pitch</br>It produces the type of sound that is considered the "standard" in cup mutes?? for most jazz musicians</br>Your family members?? neighbours and pets will not be disturbed any more</br>Enjoy your practice with this Trumpet mute</br></br>Product Description</br></br>Very useful when you feel like playing your mute in the middle of the night<br> Quiets the trumpet noise so you can re-learn how to play without your neighbors complaints<br><br> <b> Package include</b><br> 1 of Aluminum Practice Trumpet Straight Silencer <br></br><br/>http://www.amazon.com/gp/product/B01LZJKPGC