I have two racquets Yonex should investigate is genuine or fake . 1. racket model: Yonex Arcsaber Z-slash shaft serial: 9287632 cone code : 260402FR source : gifts price : US$180 2.racket model: Yonex Arcsaber Z-slash shaft serial: 9319514 cone code : 130402FR source : gifts price : US$180 Thanks !