| Business | Phone |
| Acro-Tech 12229 M 89, Plainwell 49080 | (269) 629-4300 |
| Concepts Manufacturing Co 928 Industrial Pkwy, Plainwell 49080 | (269) 685-1733 |
| J & R Gun & Machine Shop 951 Industrial Pkwy, Plainwell 49080 | (269) 685-1951 |
| Quality Machine 630 Marsh Rd, Plainwell 49080 | (269) 685-0990 |
| Tmd Machining 751 Wakefield, Plainwell 49080 | (269) 685-3091 |