Promark Jim Wunderlich JW5 "System Blue" Hard Marimba Mallet The JW5 is the hardest marimba mallet in the Jim Wunderlich signature series. Use this light and easily maneuverable mallet in the high register for quick, articulate or colorful passages Length: 17" Head Size: 1.4 x 1.70" The JW5R features a hard synthetic core wrapped tightly with an extra durable polyester cord 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