Stag Ninja Fire Table Tennis Rubber “top of the range” fast table tennis rubber and gives you all the characteristics required for advanced offensive play. The sponge is a medium hard sponge, suitable for aggressive play close-to-the-table. Stag Ninja Fire Table Tennis Rubber is the result of a completely new formula for the sponge – combined with the top sheet of Rubber. that transfers lots of rotation to the topspin and counter-topspin shots at mid-distance. The rubber surface is full of sensation, supported by the SPI-Advanced-Technology, and giving a wonderful sound and a good handling.