The 692SL backbore is rarely available. It's the tightest backbore in Bob Reeves history, making it easy to play in the mid-range to high register. The low register is also full and has an efficient sound. The characteristic is that it produces brilliant high notes typical of Bob Reeves as you put air into it. It's designed for easy control from low to high notes. It's recommended not only for big bands but also for switching mouthpieces in wind band pop music. There are some minor scratches from inserting and removing the mouthpiece and from use, but there are no dents or any other significant damage!