| Business | Phone |
| Adj Sheet Metal Inc 4334 Charles Crossing Dr, White Plains 20695 | (301) 283-3000 |
| Kane Sheet Metal Inc 4341 Charles Crossing Dr, White Plains 20695 | (301) 893-9901 |
| Southern Md Sheet Metal Supl 4342 Charles Crossing Dr, White Plains 20695 | (301) 885-2140 |