YTEX Square x String, Black, 16L-1.25mm; 40-Feet/12m

Square profile monofilament co-polymer + carbon + polyolefin string with a Thermo Foil Cooling Process finish Two Flat surfaces, mains/crosses, in contact with each other give extra durability No notching and the string returns very quickly from any movement after hitting the ball ...Square profile monofilament co-polymer + carbon + polyolefin string with a Thermo Foil Cooling Process finish Two Flat surfaces, mains/crosses, in contact with each other give extra durability No notching and the string returns very quickly from any movement after hitting the ball Power combined with great control and feel Unique! It measures 1.20mm across the flat sides and therefore plays like a much thinner string increasing power and control.