La Bella<br> 500P Professional<br> Medium-Hard Tension<br> Classical Guitar Strings
String Note Diameter (in.) Tension (lbs.) Material 1st E 0.029 16.72 clear nylon 2nd B 0.0335 13.2 clear nylon 3rd G 0.041 12.76 clear nylon 4th D 0.033 16.28 silver plated 5th A 0.0375 13.64 silver plated 6th E 0.043 11.88 silver plated Developed in the 1970s, the Professional Series® product line were the first classical guitar and lute sets to be offered in a wide variety of gauges. They have been acclaimed by concert guitarists, lutenists and prominent teachers and even used by such great luthiers as Del Pilar, Rubio, Papazian, Van Lennep and Gurian. The Professional Series® have been the preferred strings by a whole generation of great artists including: Laurindo Almeida, Julian Bream, Mario Escudero, Maria Luisa Anido, Sabicas &