| Business | Phone |
| Power Guard 1605 S 93rd St E, Seattle 98108 | (206) 764-8882 |
| R L Cook Sales & Supply Co 8814 14th Ave S, Seattle 98108 | (206) 763-8777 |
| Wilcor Grounding Systems 4045 7th Ave S, Seattle 98108 | (206) 292-9756 |
| Winberg Engineering Sales 6004 60th Ave Ne, Seattle 98115 | (206) 523-3370 |