i was hesitant to try this product at first, but I'm so glad I did! Using this product our team found that it was easy to work with and provided reliable results. The copper material was durable and held up well in an industrial setting. The price was also very reasonable, making it a great value. The only con was that it took a bit of time to get used to working with the 4oz size. Overall, we were very satisfied with this product and would highly recommend it to anyone in the Industrial and Scientific industry!