| Business | Phone |
| Sheet Metal Prototype & Prod 19420 Londelius St, Northridge 91324 | (818) 772-2715 |
| Walker Industries 18754 Parthenia St # 6, Northridge 91324 | (818) 885-9811 |
| M & S Sheet Metal Inc 18247 Parthenia St # 17, Northridge 91325 | (818) 885-7865 |
| Sun Sheetmetal 18247 Parthenia St # 18, Northridge 91325 | (818) 885-1848 |