| Business | Phone |
| Zeitcorp Limited 5 S Wabash Ave 305, Chicago 60603 | (312) 372-0668 |
| Reliable Galvanizing Co 819 W 88th St, Chicago 60620 | (773) 651-2500 |
| Silversmith 220 S State St, Chicago 60604 | (312) 427-5483 |
| Midwest Galvanizing Inc 7400 S Damen Ave, Chicago 60636 | (773) 434-2682 |