Orphee Classic guitar strings NX series for 1st. 2nd.3rd are using nylon 608 raw material.It has stable stretch and elasticity.The raw mat- erial are single-in and singleout from high temperature to prevent cracking from the inside.At the same time Ensure uniform symmetry and has a bright appearance and smoot h feel.4th.5th.6th using 608 nylon multifilament + silver plated wire.Surface layer is polished and then pa- ssivated and single layers nano coated.Ensure that the feeling smooth while keeping the original sound basically did not changed,Precision anti-vibration instrument and nearrigorous tensile test make the inner core and the outer layer of the wound are tightly combined reac- hed the resonance effect of the golden ratio.