Frame Nano Aerogel x 46T PYROFIL to increase the strength, durability and solid impact feel Shaft Metallic Carbon Fiber x WES 3.0 to enhance the pace control when switching between defense and offense Handle Power Ring Pro x Free Core provides a solid impact response at the same time defusing the vibration from impact Weight / Grip Size 3U / G5 or 4U / G5 String tension LBS 3U: 33 lbs (15Kg) / 4U: 32 lbs (14.5Kg)