The Double Fish Volant-Phoenix Rubber comes with the new technology called New-Release Pro. Providing high viscosity, strong bottom strength, good explosive force, good hand feeling, stable ball feeling. Giving a higher rate of landing with a larger arc curvature. The performance is deeply suited for the 40 new material ball, and the fault tolerance of rubber coating is strengthened at the same time. Sponge Thickness: 2.1mm Sponge Hardness: 39
