Darco acoustic guitar strings, by C. F. Martin, are made with value in mind.  But don't be misled by their low price.  They didn't  cuts corners on quality or tone.  Darco guitar strings are engineered and manufactured under strict tolerances and controls, using quality materials.  D-2100's are made with 92/8  phosphor bronze alloy windings, which gives them a clear and mellow tone.  They may be inexpensive, but they are an incredible value in terms of tone and playability.  Darco is value without compromise.

Diameters:  .010  .014  .023  .030  .039  .047  inches