For classical guitar, Darco D30HB's continues C. F. Martin's tradition of quality and value for excellent performance. Economically priced, they are an incredible value in terms of tone and performance in classical guitar strings.  Darco is one of the C. F. Martin lines of fine guitar strings.  C. F. Martin is a name synonymous with fine guitars and guitar strings.  As always, Darco is value without compromise. 

Diameters:  .028  .032  .040  .035  .043  inches