HEAD IG Challenge Pro Tennis Racquet Strung with Cover - 4 3/8 Grip - Teal The CHALLENGE PRO, the slightly heavier model compared to the CHALLENGE MP, provides the perfect mix of power and control to the competitive club player. It is the perfect choice for competitive club players who need a heavier racquet on the court. With its eye-catching design and a combination of matt and glossy finishes, the PRO provides the perfect mix of power and control. WEIGHT (UNSTRUNG):295 g / 10.4 oz STRING PATTERN:16/19 HEAD SIZE:645 cm² / 100 in² GRIP SIZE:4 3/8 BALANCE:320 mm / 1 in HLLENGTH:685 mm / 27.0 in BEAM:23/26/23 mm