The mark, as illustrated in the accompanying drawing, comprises the product configuration of a set of bass guitar strings. Specifically, the mark comprises the particular color silk wrap used on the end of each string where it is wound around the guitar peg.
The silk wrap of the E string (first from the top in the drawing) is red, the silk wrap of the A string is blue, the silk wrap of the D string is black and the silk wrap of the G string (lowest string in the drawing) is green.