D'Addario Kaplan Cello String Set, 4/4 Scale, Medium Tension 4/4 size cello with a playing length of 27 1/2 inches (700mm) Medium tension Solid and stranded steel core strings perfectly matched for the most discerning player Projection, clarity and richness, balanced across the set All D'Addario strings are designed, engineered and manufactured in the USA to the most stringent quality controls in the industry