| Business | Phone |
| Alfred Dill Inc Race & Winteramp;, Baltimore 21230 | (410) 837-5774 |
| Cwc Sheet Metal Inc 3001 Druid Park Dr, Baltimore 21215 | (410) 462-6220 |
| Cwc Sheet Metal Inc 4104 Harris Ave, Baltimore 21206 | (410) 325-5220 |
| D & D Sheet Metal Works 2112 Aliceanna St, Baltimore 21231 | (410) 675-1559 |
| J M Gillin Corp 924 W Saratoga St, Baltimore 21223 | (410) 728-8700 |
| John G Hetzell & Son 110 Harmison St, Baltimore 21223 | (410) 233-2141 |
| Metacond Inc 1227 Bush St, Baltimore 21230 | (410) 752-0800 |
| Netzer Metalcraft Aerofab 1600 W 41st St, Baltimore 21211 | (410) 467-9762 |
| Rel Schneider Co 4804 Curtis Ave, Baltimore 21226 | (410) 355-2120 |