Graphel - A manufacturer and supplier of graphite blanks, as well as a distributor of EDM materials and supplies to the EDM industry.
https://graphel.com/
Helwig Carbon Products Inc - Manufacturers of carbon brushes, brush holders, constant force spring assemblies, mechanical carbons & more.
https://www.helwigcarbon.com/
NAC Carbon Products Inc - A manufacturer of graphite and carbon products including carbon and graphite rods and blocks.
http://www.naccarbon.com/
