Robert, yes I think the one in the picture is correct, the I.D. On mine is 3/4" and the O.D. Is 1-13/16". I think mine are about 5/16" from back to front. I think I might have a line on one, but I don't know the condition of it yet or if the fellow even has it. I have nine of the ten, and my tenth one is usable just doesn't match the other nine. Thanks, Tim