SKYPRO 3 Pcs 99.9%+ Pure Copper Sheet, 1.96" x 1.96", 18 Gauge(1mm) Thickness for Industry Supply, DIY Projects, Jewelry, Repairs, Experiments

This is as advertised. Can't get better than that.

This proved to be a great product. After my first experience with it, I ordered two more. I would have given it five stars except for the long lead time required to actually receive it. But, if you can afford to wait a few weeks, I don'y think you will be disappointed.