Graf powder from my understanding is made by Wano Powder Company. Produced in Germany.
I was going to purchase some from Graf but I wanted other powders as well and when they explained there would be separate hazmat fees because some of the powder comes from a different supplier, I told them I was not interested.

Some day I will get about 10 pound of it just to try. If you happen to get some, I would be very interested in your observations and how well the powder worked for you...