D'Addario Helicore Fourths-Tuning Cello E-String, 4/4 Scale, Medium Tension 4/4 size cello with a playing length of 27 1/2 inches (700mm) Medium tension Designed to be tuned in bass tuning (E, A, D, G  low to high) Versatile string that works well for a wide variety of playing styles and instruments All D'Addario strings are designed, engineered and manufactured in the USA to the most stringent quality controls in the industry