Technical Specification: speed: 13.5; control: 13; spin: 14; loop: 14.5; forward: 14.5; This rubber is specially provided for professional provincial table tennis team members.
Double Coating Tech: 729's original technology adds 1 thin 0.3mm layer of adhesive to the original single-coat technology, which prevents oxidation and makes the tackiness last longer.
Graphene Reinforced Material: For rubber formulations, most rubbers on the market use a Carbon Black reinforcement. The 729, however, relies on the technical strength of the Rubber Research Institute and for the first time adds Graphene reinforcement to the formulation of table tennis rubbers, replacing the traditional Carbon Black as a reinforcing agent, which greatly improves the toughness and elasticity.
Performance of New Sponge: 1. Speed: The compound structure of large with small holes, turning the walls of the original solid pores into "small air pockets", will give the sponge more elasticity, faster ball release and a more permeable feel. 2. Spin: The compound structure of large with small pores allows the sponge to remain more supportive than thin-walled sponges, so it is easier to create friction, pulling the ball with ease and spin.
Two Sizes of Sponge Pores: The 729, based on the inherited rubber technology, has introduced the first digital microscope system in the domestic table tennis industry that can be magnified 1000 times in order to overcome technical difficulties, which also formally introduces the field of table tennis rubber technology to the micron (um) level. A 100x magnification of the Battle 3 sponge is shown below.