97, 310g, HM graphite/Black micro core/Namd/VDM, 16x19 string pattern, 27 inches. 330g model Used by Stan Wawrinka, Hydon Chung, Frances Tiafoe, Pierre Hugues Herbert and Hubert Hurkscz. Vcore Pro 97 HD, 320g, 18x20 string pattern for more spin and control. All V Core Pro rackets in new Green, Matt Green and Purple colour, made in Japan.