["2pcs/pack original D2FC-F-K (50m) blue dot mouse micro switch new model of 10m 20M 7N series 50 million times for lifetime\n\nFeatures: new product D2FC-F-K (50m), for lifetime can be up to 50 million times, the blue button, longer than the ordinary 20M life, and even, feel crisp, very comfortable! 7N 20M and OF slightly closer to the handle, relatively more crisp, feeling a little less lag rebound,Relatively slightly lighter!\n\nAs long as the your mouse is using rectangular three pin micro switch, then you can use this one to replace it.\n\nCurrently known to apply to the following mouse fretting changes:\nfor Microsoft Red Shark IO1.1 (left and right buttons)\nfor Microsoft Silver Shark IE3.0\nfor full range\n MX Series\n for Saturn Trackball\n for Mars Trackball\n G series\nfor Apple G3 G4 G5\n\nPackage includes: (Without retail package)\n2 x Original D2FC-F-K (50m) Mouse Micro Switch"]