KELLY^TM Mouthpieces have been developing slowly for the past 25 years. Finally, they’re here! Jim and Erin have shared a life of music in addition to owning and operating a CNC machine shop. This combination of euphonium playing and machining expertise lends itself perfectly to the result – KELLY^TM Mouthpieces. Our mouthpieces are designed, fabricated, tested, and packaged right at our plant in Fond du Lac, Wisconsin. We will continue to expand our product line as well as adding custom mouthpieces! Please jump on board with KELLY^TM and get yourself one today!