Thomastik - 641.427

Steel rope core with reduced stiffness and improved elasticity.
high fifth purity.
durability and tuning firmness.
4/4 set chrome (25/27/28/29).
Tension: soft 53.1kg/117.1lbs.
medium 57.2kg/126.1lbs.
strong 59.5kg/131.3lbs.