Promark Jim Wunderlich JW2 "System Blue" Medium Soft Marimba Mallet The JW2 has great articulation and response in the low-range of 4.3 octave marimbas or those keyboards with "dry" bars Length: 17" Head Size: 1.70 x 1.88" The JW2 features a rubber-like synthetic core wrapped tightly with durable synthetic yarn on a lacquered birch shaft for a smooth finish with maximum strength Durable enough for outdoor environments, but the lush tone of these mallets is an appropriate and tasteful choice for indoor concert or marching settings All Promark drumsticks are designed and manufactured in the USA