Courtland [Steady Sink] or 3M [Uniform Sink] ST12S/type V (probably). This is a long-term storage item. ● I actually measured it for the listing. It was 11.7m/31g. I used a household food scale, so please understand that there may be some errors. ● I used it only once for casting practice in a lake, so I don't think there are any noticeable scratches, but please judge the current condition from the images. Please forgive any other oversights. ● Please refrain from purchasing if you are concerned about even the smallest details. ● Thank you for your understanding.