Wilson pro staff 97uls (2017) tennis racquet authorized dealer with warranty please include your name, invoice number, and reason for return. Strung Balance 4 Points Head Light Swingweight 315 Flex 64 Beam Width 23 mm / 23 mm / 23 mm Composition Graphite String Pattern 18 Mains x 16 Crosses Recommended String Tension 50 60 lbs.