●PRODUCT SPEC - Grip Size :Undersize/ Standard / Midsize , Core Size : 0.600" Round , Grip Lenth : 10.50" , Weight : 45±3 g /52±3 g / 70±3g , ●PROPRIETARY RUBBER MATERIAL - Exclusive high-feedback rubber material used to providing precise ball feedback and comfortable feel all time. ●Design Style:Pure Color Design. ●Material:High quality rubber of special formula. Abrasion resistant, anti-slip, high stability and good shock-absorption. Suitable for all-weather conditions. ●Patent pending : Designed by Kingrasp and has applied for patents in the us, ca, jp and uk.