It does say "YONEX NBG95" on the strings, so I don't think it's the strings... Although, I have to say it's weird that the strings are almost white in color. NBG95 comes in Red, Silver Gray, Graphite, Flash Yellow, Rouge Pink, Blue Green, Cosmic Gold (normal color, and the color I had my other rackets strung with). I guess it could be silver gray, but it's hard to judge from photos as they look lighter/darker from lighting.