HEAD Graphene 360+ SPEED PRO BLACK Tennis Racquet (Unstrung) DSC string 0 in Grip Size these mid range tennis 0 in Grip Size G3 Beam – 23 mm String Tension 48 57 lbs Playing Level – Advanced Ideal for – Tournament Players Speed series is endorsed by Novak Djokovic and Speed Pro 360+ is a powerful tennis racquet with excellent feel and spin friendly control FSI Spin conveys a progressively open 16x19 string example and consolidates with Babolat's great Woofer System for most extreme turn and force potential String pattern: Wider Cross Strings (Open 18x20 string pattern) for added Power and Spin Specifications: Material Graphite Weight (Unstrung) – 310 grams String Pattern 18 20 Head size 645 sq