These 6 piece kits contain two pieces of 1/2", 3/8" and 1/4" tuning slide tube designed to reduce or eliminate the gap in the tuning slide created when the slide is pulled out to tune. The selected lengths are inserted ahead of the tuning slide to create an uninterrupted tube from mouthpiece to valve cluster to greatly reduce back pressure and create better intonation, freer blowing and improved slotting in all registers. Inserts can be removed easily with the use of a cleaning snake. |