| Business | Phone |
| Qual-Fab 1705 S 93rd St F11, Seattle 98108 | (206) 762-2117 |
| Whitehead Manufacturing 9635 W Marginal Way S, Seattle 98108 | (206) 767-9974 |
| Teeters Metal-Fab 9422 Roosevelt Way Ne, Seattle 98115 | (206) 524-2814 |
| Spunstrand Inc 1631 Belmont Ave 3, Seattle 98122 | (206) 726-8435 |
| Pacific Sheet Metal 111 S Spokane St, Seattle 98134 | (206) 682-5354 |
| Skyline Electric & Mfg Co 3619 7th Ave S, Seattle 98134 | (206) 682-4422 |
| Northend Home Heating 4115 Ne 203rd Pl, Seattle 98155 | (206) 367-6055 |