Liberty Adjustable Clarinet Barrel Precision manufactured from aerospace grade materials, this adjustable clarinet barrel allows you to be in tune under any playing conditions Simply rotate the tuning ring located at the mid-section of the barrel and bring your clarinet into tune quickly, easily and most importantly, perfectly Infinitely adjustable in length from under 59mm to approximately 69mm, no other tuning barrel is necessary No more pulling at the joints or clumsy rings This single barrel solu-tion will save you time, money and frustration.