• Inegra - Innegra™ is today the worlds lightest high performance fibre. Its extreme toughness together with HEADs advanced carbon composite technology leads to a novel ultra tough hybrid composite. • WEIGHT (UNSTRUNG): 250 g / 8.8 oz • STRING PATTERN: 16/19 • HEAD SIZE: 645 cm2 / 100 in2 • BALANCE: 310 mm / 0.8 in HL • LENGTH: 660 mm / 26 in • BEAM: 22 mm • AGE: 9 - 11.