| Business | Phone |
| Able Electronics 31033 Huntwood Ave, Hayward 94544 | (510) 477-5000 |
| Leoco Usa Corp 30800 Santana St, Hayward 94544 | (510) 429-3700 |
| Quality Service Group 1363 Thornwall Ln, Hayward 94545 | (510) 489-8847 |
| Zentek Scientific Systems 27738 Industrial Blvd, Hayward 94545 | (510) 786-1469 |