These disks are designed to increase the mass of your backbore.  Versatile and unobtrusive, you can choose the weight of the disk you need for the next piece in the program. Sold in sets of four different sizes, or individually, Najoom® Mouthpiece stabilizers are for standard weight cornet and trumpet mouthpieces. They provide  another way to customize your playing and give you other sound and feel options. US$22.00 each US$80.00 per set of 4 Silver Plated

Attributes Increase dynamic range Adjust & stabilize your tone Versatile Add body, core & stability of pitch Customize your playing Other sound & feel options

A note from Dennis...

"The mouthpiece stabilizers add many more options for the player to customize his or her own instrument.  One way these would be used is to compensate for different acoustical situations as well as to help enhance a specific passage,  e.g. the opening to Capriccio Italian.   They add body, core and stability of pitch to the passage.  The uses are endless."