Adamas Strings for Acoustic Guitar Nuova Phosphor Bronze coated round core - Also suitable for people with allergy (1717NURC)The legendary Adamas Phosphor Bronze strings now as Round Core coated Nuova version Slowly wound high end string Round instead of hexagonal core wire The winding is in full contact with the core wire, resulting in longer sustain and a more balanced and overtone rich sound. Lower string tension with the same wire gauges for a very pleasant playing feel Roundcore strings must not be shortened BEFORE stringing, otherwise the wrap will come loose and the