| Business | Phone |
| Alloy Processing 1900 W Walnut St, Compton 90220 | (310) 635-9995 |
| Barken's Hard Chrome Co 239 E Greenleaf Blvd, Compton 90220 | (310) 632-2000 |
| Electro-Machine & Engineering 431 E Oaks St # B, Compton 90221 | (310) 639-1621 |
| S & K Plating Co 2727 N Compton Ave, Compton 90222 | (310) 632-7141 |