... ,pharmaceutical tubes,collapsible tubes ,toothpaste tubes, Capacitor Shell and more)have a good quality of oxidation in the surface ... aluminum-slug have process: annealing and tumble,for the suface.Remark The Aluminum Circle for the size according to the ... customer requirement to open the die(the die is free) Aoo1070 Aluminum Disc,Aluminum Circle-->For cookware <Pan ,Pot ...