In 2008、Wilson Japan sold 3000 Kei Spec [K]Tour 95 Racquets, only for Japan. The spec was Weight:313g unstrung (288 for Normal) Balance Point: 345mm (340 for Normal) Length:27.25inch 22mm Flat Beam Comes with a Kei's Logo and a stretched grip by Nishikori's request In 2009, he injured his elbow, and I heard that he changed the spec. Then, in 2011 Swiss Indors, he switched to a STeam Pro, which is only sold in Japan. The story Wilson Japan gave was that he requested for more Basalt Fibers to be added. When he got a test racquet, he loved it, and requested to Wilson if he could use it immediately. The spec of Steam Pro is Weight:309g unstrung Balance Point: 325mm Length:27.25inch 22mm Flat Beam The shape of the racket is completely same as Tour BLX 95 or [K]Tour 95, and it is not a limited production, but only sold in Japan Also, Wilson Japan sells a Steam95, which is completely same spec as Tour BLX 95. Then, in 2012 June, Wilson Japan sold a STeam Pro with Kei Spec for 700racquets. This seems to be what Nishikori uses right now. STeam Pro with Kei Spec Weight:318g unstrung Balance Point: 320mm Length:27.25inch 22mm Flat Beam Comes with a Kei's Logo and a stretched grip by Nishikori's request, and replacement Grip is little bit harder than Comfort Hybrid. However, I am little unsure about what Wilson told to Japan. What they says seem to be logical, but isn't the STeam Pro just a PJ for Tour BLX95?