Here we have our 3rd octave clear quartz crystal singing bowl sets. Because clear bowls are lighter then frosted bowls, they are much harder to play in the 4th octave. Because of this we only offer clear bowl sets in the 3rd octave here. If you are interested in clear bowls in the 4th octave please see our handle bowl sets where you can get great alternatives. These 3rd octave bowls are very low, starting in 3rd octave C and going up to 4th octave C. Please let us know if you have any questions. Call us at 802-674-9585 or email us email@example.com.