| Business | Phone |
| Holsinger Steel & Supply Corp 368 Beinoris Dr, Wood Dale 60191 | (630) 616-8250 |
| Interwire Products Midwest Inc 887 Sivert Dr, Wood Dale 60191 | (630) 833-0830 |
| Metrix Inc 165 Mittel Dr, Wood Dale 60191 | (630) 595-9800 |
| Tangent Mold Corp 701 Creel Dr, Wood Dale 60191 | (630) 860-2004 |