One-piece solid High-purity Pure Purple Copper instead of inferior sounding multiple pieces or brass.
Especially pure "Hanging Gold or Silver" directly-plated without normal sound-damaging intermediary layer.
Cold-Welded connection instead of inferior sound-damaging solder.
WARNING: California Residents - Proposition 65. This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov