Chroma-Notes™ Handbells use the same colors as Boomwhackers and other Chroma-Notes™ products; Which make it easy to play the color-coded songs in Boomwhackers songbooks or created with the Chroma-Notes™ Composer software. Manufactured to the highest standards, the top quality construction and accurate intonation make these bells the best value available. The ChromaNotes TM colors make it more fun to learn and play along with Boomwhackers® music tubes and Boomwhacker educational materials. Each metal bell is marked with the proper note and number to help children learn the musical scale. Five inches tall, the long handles enable players to grasp the bells securely. THE 5 NOTE CHROMATIC ADD ON SET INCLUDES THE NOTES C#, D#, F#, G#, A#. Note: you must have previously purchased the 8 Note Diatonic set (CNHB-D) for proper use of the Chromatic Add-on set.