The rubber surface of the MX-P 50 HARD version is identical to the rubber surface of the already familiar MX-P (47.5) which is famous for its incredible grip and extraordinarily high spin. Professional players have already had this high-performance harder sponge available to them and with the new generation of plastic balls setting in, this rubber is now available to all players. Professional players have had the choice between fine-pored and large-pored sponges. The original MX-P (47.5.) is large-pored but the fine-pored variation, MX-P 50 HARD is now available. This fine-pored version plays noticeably different with an increased forward and direct trajectory and speed.