Pro-Arte strings are our the world's best selling and D'Addario's premium classical guitar strings. All Pro-Arte treble strings are sorted by a sophisticated computer-controlled laser machine which performs diameter/tension measurements and quality check's, insuring true sounding, precise trebles in every set. J51 Pro-Arte Basses are made from silverplated copper wound on Nylon which is polished semi flat. These polished basses reduce finger noise making them excellent for recording.

Recording strings
Semi polished bases
Clear nylon trebles