Not sure on this one I have a 645 solo and like the little saw very much, but I think it might be a typo and should say 645-18? I believe the 18 stands for 18''bar. All of this is really a guess! I figure if I post it will move this thread up the list and someone with more knowledge will answerWhat is the SOLO 643-18? I can't find it anywhere except at the solo-usa site. Any specs? Thanks, Mark
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