We still can produce coil with 12 fpi.Typically for the coil. We can produce with 12 fpi.But we want to increase the bending coil, density of fin, more to avoid the settlement of coil between lieng bending.
We can still produce coils with 12 fpi usually for general Coyle. We can produce about 12 fpi coil bending but we want to increase the density of Dauphin more to avoid fracture of the coil during bending.