D'Addario Kaplan 4/4 Size Cello Strings 4/4 Size Light 4/4 size cello with a playing length of 27 1/2 inches (700mm) Available in light, medium and heavy tensions Ball end strings with black and silver silking A string with titanium winding; D string with nickel winding; G and C string with tungsten winding Solid and stranded steel core strings perfectly matched for the most discerning player