Quality strings since 1956; Steel core, metal alloy or fibre winding; Warm, brilliant sound and durability; “Classic” standard strings series; The A+D strings of the “Special” series are 0.01 mm thicker; The “Superior” strings are 0.02 mm thicker than “Special”; “Silver Sound” G strings with flexible steel core and silver winding; D “Special” ; Saitenstärken dolce 0.98mm, medium 0.99mm, forte 1.00mm;