3/16? somewhere thereabouts. touch panels are made pretty consistent. the only issue with swapping it out is you have to swap it for the same part because you have to retain the same controller. sure, you could plop a ELO overlay and controller in there, but the software is programmed to have the exact controller that's in it...in it. you can't just slap another controller in there cause the game won't know what to do with it. (and would throw up an error saying the touchscreen is not found as it boots)