Normally，10~80 pcs can be made by one silicon mold，can make a new silicon mold to produce more.

Yes, You can choose from lots of manufacturing materials including metals.
Below is our available metal alloys for 3D printing. Various heat treatments are available depending on material.
Copper (CuNi2SiCr)
Aluminum (AlSi10Mg)
Stainless Steel (316L)
Stainless Steel (17-4 PH)
Titanium (Ti6Al4V)