The legendary Silver-Special professional strings for classical guitars;Nickel free according to DIN EN 1811, complies with the REACH regulation (EC) Nr. 1907/2006;Treble strings precision round;Bass-strings with high silver plating;Surface treatment of the tension wire (coated, tarnish-proof);Strings for small instrument sizes in MT and HT available on request ;Made in Germany;Medium Tension;E-1: 7.0kg/15.43lbs;H/B-2: 6,0kg/13.23lbs;G-3: 6.5kg/14.33lbs;D-4: 0.73mm/,029", 7.5kg/16.53bs;A-5: 0.91mm/,036", 7.3kg/16.09bs;E-6: 1.11mm/.044", 7.5kg/16.53lbs;