Product : DHS PF4 Packing : 1 piece Features : rotation + speed Thickness: medium thickness Hardness : about 39 degrees Play method: arc + fast break Color : Red / Black The classic rubber of the small ball era, the new PF4, is more suitable for large balls and water-soluble glue. The new PF4 enhances the viscosity of the rubber, making it easier to create strong rotation. The elastic sponge makes the new PF4 faster and more elastic. It is suitable for the combination of arc and fast attack.