Our ProMark Jim Wunderlich "System Blue" Medium Vibraphone Mallets feature a round synthetic core with brass inserts and latex covered with a synthetic cord, providing medium-soft articulation and full tone. Their rattan handles offer flexibility and durability, making them ideal for demanding and versatile performance. Designed by the renowned Jim Wunderlich, these mallets are not just suitable for marching settings, but also produce lush tones in indoor concerts.