| Business | Phone |
| A & J Electric Cables 1932 W Winton Ave # 9, Hayward 94545 | (510) 786-2700 |
| Davis Wire Corp 31775 Hayman St, Hayward 94544 | (510) 471-6030 |
| Omni Cable Corp 26328 Corporate Ave, Hayward 94545 | (510) 887-8600 |
| Vulcan Inc 21064 Cabot Blvd, Hayward 94545 | (510) 887-2495 |