| Business | Phone |
| Airway Sheet Metal Co 110 Oakgrove Rd 103, Sterling 20166 | (703) 471-4300 |
| Pro-Type Industries Inc 45871 Woodland Rd, Sterling 20166 | (703) 450-5200 |
| N J Sullivan 45900 Old Ox Rd, Sterling 20166 | (703) 471-0544 |
| K-Form, Inc. 9a Acacia Ln, Sterling 20166 | (703) 450-4401 |