Pitbull classical guitar SILVER series are designed for a comfortable and silky feel. The package contains clear nylon trebles and silver plated cooper wound bass side.The R&D research we carried out for SILVER Series resulted with the best quality raw materials, great performance features and the best price. With this, Pitbull Strings designed the SILVER series for musicians to get the best performance with most economical convenience. 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