The mouse on my computer died this morning so I had to go buy a new one I was about to toss the old one in the trash when I decided to strip off the wire just to see what was inside. "Lo and Behold" four 8 foot strands of extremly fine insulated wire AND its as flexible as a wet noodle. This stuff would be ideal for hook ups inside a loco or for making working street/building lights. My wire gauge only goes to #32 and its smaller than that!!! suspect its probably about #34 or #36. So don't throw away that "dead" mouse ... use it for a "transplant" Just thought I'd pass this on to my buddies on The Gauge PS: If its a PS2 Mouse So much the better....they have 5 strands of wire in them.