From the manufacturer: We begin with the finest nickel plated steel wire and coat it using a finely regulated process. This unique technology coats the outer wires which are then wrapped around a high quality core wire producing a string that has outstanding extended performance life with powerful tone. The plain steel strings are also coated to give a well balanced feel.

Light Guage, Long Scale Plus (Fits 34", 35", 36" Scales)

Gauge .040 .055 .075 .095