| Business | Phone |
| E O Salinger Sheet Metal Works 510 E Lloyd St, Milwaukee 53212 | (414) 372-2300 |
| Koch Sheet Metal Inc 3178 N Fratney St, Milwaukee 53212 | (414) 263-2265 |
| Metal Shop Co Inc 3415 W Elm St, Milwaukee 53209 | (414) 228-7776 |
| Vetter Sheet Metal & Heating 2578 N Holton St, Milwaukee 53212 | (414) 374-1119 |
| Sai Specialty Assoc Inc 11122 W Rogers St, Milwaukee 53227 | (414) 327-6066 |