The O3 Hybrid Tour provides another option for serious competitive players to make the switch to the O3 Engineered technology Length 27 68.6 cm Head Size 95 Weight 11.5 oz unstrung 325 gm Balance 12.231.0 cm HL Cross Section21mm HeadShaft Type of Swing Moderate to Full String Tension 51 61 lbs. Flex Firm String Pattern 16x18 Composition Graphite Grip Dura Tac Black Power Level 775 Comes without cover