Profile: Union City Filament Corp. offers proprietary processes for winding & forming tungsten, molybdenum, rhenium and their alloys. We also provide tungsten wire, coatings & powders and wire testing service. Our double helix cylindrical designs consist of single wire coils and coiled coils wound into two helices on cylindrical mandrels for a specified number of turns at a specified pitch. Leg formations, coil diameters, and wire diameters can be modified.