D'Addario K613-34M double bass string A-3 3/4, medium, stranded steel, nickel woundD'Addario K613 34M double bass string A 3 3 4, medium, stranded steel, nickel wound Kaplan double bass strings are aimed at the most discerning orchestral musicians. Kaplan strings offer a rich tonal color palette and superb bowing response in a beautifully balanced set. The set provides clarity and warmth from low to high registers and allows versatility and control throughout the dynamic spectrum. Scaled to fit 3 4 size bass with a playing length of