Optima Violin strings PROTOS Set

Violin strings PROTOS Set, Violin strings. Formerly Lenzner 1010B. OPTIMA Protos steel strings, pure nickel flat wire wound. Very good playability with excellent sound. Very smooth surface, easy playability and sure response. e'' 0.26mm/.010 inch steel, plain, with ball end. a' 0.39mm/.015 inch, d' 0.53mm/.021 inch, g 0.70mm/.028 inch steel/pure nickel flat wire wound. Gauge: medium. . .