Rasanter R45, R48, C48, R53 and C53 rubbers are equipped with the sponge that has the same pore size as the previous Rasanter versions but with increased inner tension. This makes each cell a small compressor and gives the rubber greater power potential. C is for counter-spin. The pimples in the topsheet of Rasanter C rubbers are equipped with wider basement that neutralizes the incoming rotation and allows controlled counter-spins with aggressive trajectories. Due to the compression of that pimple base, the Rasanter C also makes it possible to improve the serve-return game considerably. The 53 degree is the hardest and fastest version, built for the top players. It requires more practice to control than the Rasanter C48 does.