Jack, just ran out and measured mine. 5/8" is right for the width, but I dont think it is 1/8" thick, it seems a tad thinner to me (maybe 'cause its the rusty, old original!)! Rounded at the ends with a 1/8" hole drilled at each end (not sure what for though, maybe to aid in sliding it in - easier to pull through than push!) and remember it does have a bow in it that conforms to the bend of the windscreen frame! :thumbsup: