System Blue is a new line of marimba and vibe mallets designed by the 14-time World Champion Blue Devils and Pro-Mark Corporation. Joining forces, both groups have had long standing commitments to education, performance, and product excellence. The Blue Devils Percussion Staff and Jim Wunderlich has collaborated with Pro-Mark in designing these new System Blue mallets from scratch and all System Blue mallets are available to you, the end user, here now. These mallets from the Jim Wunderlich and Diversity Series are for indoor/outdoor marching percussion and for concert playing as well.