The ProMark Diversity Series DV1 "System Blue" Marimba Mallet features a thin latex-wrapped rubber core for full tone at all dynamics combined with a synthetic wood-blend yarn covering the head. The lightweight birch handles provide a solid, comfortable feel. Designed by The Blue Devils percussion staff, these 8 mallets cater to a variety of players and educators, offering 4 graduated marimba mallets for use on synthetic and rosewood marimbas.