D Addario ENR72 Half Rounds bass guitar strings 50-105. This set is fit for long scale basses with a string scale length of up to 36 1/4 inches. D'Addario Half Round bass strings are wound with pure nickel, then precision ground, leaving the outer surface smooth and semi-flat while retaining the flexibility of round wound strings. D'Addario's exclusive heat treating process ensures that Half Rounds retain their round wound brightness and sustain.