These barrels are made from BEHN rod rubber for optimum dimensional stability and impeccable resonance. They are available with our patent-pending +HAPTIC Feedback built into the center ring's motion. Every 1/4 turn, you'll feel a slight point of resistance and release, giving you blind access to the exact position of your barrel's length.
 
The center tuning ring is made of hard rubber, which is extremely lightweight at only 26 grams (note that a standard fixed length barrel with metal rings is typically around 46 grams by comparison). This is noteworthy especially if you find the weight of the clarinet cumbersome and seek a lighter, more comfortable experience. But the sound isn't light at all—it is full, lively, and flexible. The barrels have a 5 mm range of motion totally from 63 to 68 mm.