Bullseye Flute Balance Cap L size Gold (24k) Plate For Sankyo, Muramatsu, Altus, and Miyazawa flutes I used this on a Muramatsu EX for about six months. It made the sound clearer, and the tone became thicker and richer, surprising even my flute teacher. Highly recommended for those who want to easily change their tone. I am selling this because it no longer fits my Powell flute, which I recently purchased. [Note] I have discarded the original bag and backing card, so I will send it in the bag for the balance cap I purchased for my Powell flute. Please note that returns are not accepted.