The Mike Balter Universal Series offers an array of multi-tonal models. Loosely wrapped wool yarn wound heads around heavy, hard cores with various underlayments that change timbre with the strength of your stroke. Designed to encompass the entire range of a five-octave marimba, the Universal Series delivers as much or as little impact as you will ever need. Created for the serious marimba soloist or ensemble player. Available in longer, thicker Satin Birch or Rattan Handles.