Made with Zildjian’s famous 80% copper/20% tin content bronze alloy, each note of the Low Octave Crotales are hand-selected for sustain, vibrato speed, and vibrato prominence. Once selected, the sets are sonically matched to the highest standards to produce an instrument that is cohesive and balanced throughout both octaves. Each note's hub size is proportionally scaled to provide greater sustain. The low octave set played is from written Middle C up one octave. The high octave set played is from one octave above that. Both sets come complete with respective Octave Deluxe Crotale Bar.