Pitbull classical guitar strings COATED series have a natural and excellent timbre quality thanks to the non-felt nano coating technology developed by Pitbull. Silver wrapped strings have tremendous resonance capacity. Crystal nylon strings offer a smooth and bright tone. Your fingers will not feel or detect the coating on the strings thanks to our high quality coating technology ! If you need long lasting and natural notes, the COATED series are for you. Their shelf life is due to our super VCI packaging system. String Gauges: E. 1st=.280, B. 2nd=.322, G. 3rd=.403, D. 4th=.29w, A. 5th=.35w, E. 6th=.43w