D'Addario Pro-Arte Extra-Hard Guitar Strings

Pro-Arte strings are D'Addario's best selling premium classical guitar string. Clear nylon treble strings are sorted using a sophisticated computer-controlled laser machine, which performs diameter/tension measurements and quality checks. This insures true sounding and precise trebles in every set. Pro-Arte basses are wound using silverplated copper on a multi-filament nylon core. Extra-Hard tension.