D'Addario Helicore Orchestral Bass String Set, 1/10 Scale, Medium Tension 1/10 size bass with a playing length of 28 inches (710mm) Medium tension Stranded steel core provides optimum playability and produces a clear, warm tone Optimized for arco use All D'Addario strings are designed, engineered and manufactured in the USA to the most stringent quality controls in the industry