Weight / Grip Size:  3UG5 / 4UG5 / 5UG5 String tension: 3U:≦ 32 lbs (14.5Kg)
4U:≦ 31lbs (14Kg) Frame Material: High Resilience Modulus Graphite+HARD CORED TECHNOLOGY Shaft Material: High Resilient Modulus Graphite + PYROFIL + 6.8 SHAFT Balance Point: Head Heavy Shaft Flexibility: Stiff *Stringing above the manufacturer's recommended tension can compromise the integrity strength of the racket frame. Therefore, will void the manufacturer's limited warranty.*