The HA100 is designed to hold most cornet, trumpet, trombone and French horn mutes. This mute holder features 270 degrees of ring swivel to provide the ideal mute set up. Each ring is covered in a specially designed foam to eliminate noise when inserting or removing mutes. Designed to easily attach to most music and microphone stands, the HA100 fits a shaft diameter of 0.31 to 1.18 inches (8-30mm). This mute holder also includes a detachable accessory tray so you can easily have a bottle of valve oil or an extra mouthpiece in easy reach.