The OGKILS LD 1000Z was developed for players seeking maximum speed and highest precision. Its aerodynamic design, optimized balance, and innovative technologies enable lightning-fast reactions, excellent maneuverability, and a professional playing feel. Weight/ Grip Size 3U/G5 4U/G5.6 String Tension LBS 3U≦30 lbs, 4U≦29 lbs Frame material High Modulus Carbon Fiber M40X+M30 Hardness Hard Shaft material High Modulus Carbon Fiber M46J Racket Length 673mm Balance Point 3U 293±3 4U 300±3