The rubber surface of the MX-P50 HARD version is identical to the rubber surface of the already familiar MX-P (47.5). Our professional players have already had this high-performance harder sponge available to them and due to the new generation of plastic balls, we are now making this available for all players. Our professional players have the choice between fine-pored and open-pored sponges, currently the MX-P (47.5.) is open-pored but we are now releasing the fine-pored variation, MX-P50 HARD for sale. This fine-pored version plays noticeably differently with an increased forward and direct motion.