Material thickness

The material thicknesses of 0.0393 inch or 0.0629 inch can be chosen for 1, 2, or 4-layer boards at no additional charge. If you choose 0.0393 inch, then only a chemical nickel/gold (ENIG) surface is possible.
Multilayer circuit boards with 6 layers are only available with 1.6mm thickness.

The base material is exclusively FR4 with 35 ┬Ám copper thickness.