MEINL Sonic Energy Crystal Singing Bowl Mallet - Medium (CSBM) The Meinl Sonic Energy Crystal Singing Bowl Mallet is the perfect addition to your crystal singing bowls. The rubber head is perfect for gently tapping crystal singing bowls, while the wooden handle makes the mallet very comfortable to hold. If you are searching for a crystal singing bowl mallet, that can achieve a wide variety of sounds, this mallet is just perfect for you.