Victas Spectol Series
The Spectol series by Japanese brand Victas, formerly TSP, is a line of offensive short pimples rubbers made in Japan and commonly used by fast powerful hitters.
S1 is softer and offers great control and spin capabilities. S2 is similar to S1 but with a harder boosted sponge for extra speed. S3 has thinner pimples than S1 and S2 to produce more disturbance and unpredictability.