This is an old glass canning jar lid that is still very good to use. It has some minor imperfections around the edges from use over the years but nothing unexpected. The lines in the glass are from the making as are any little air bubbles. Also this lid has a yellow swirl that you can really only see when in the right light. It looks green in photos but it is actually light blue in color. I didn't even notice the yellow color until I was taking photos so it isn't really noticeable. I tried to show all measurements and details in photos to help you judge best. Thank you for looking!