| Business | Phone |
| Conveyor Technology-Western Mi 2766 3 Mile Rd Nw, Grand Rapids 49534 | (616) 791-6940 |
| Convey-Tek 2766 3 Mile Rd Nw, Grand Rapids 49534 | (616) 249-8540 |
| Conveyability Inc 2889 Northridge Dr Nw, Grand Rapids 49544 | (616) 647-8888 |
| Frost Inc 2020 Bristol Ave Nw, Grand Rapids 49504 | (616) 453-7781 |
| Frost Links Inc 2900 Northridge Dr Nw, Grand Rapids 49544 | (616) 785-9030 |
| Whirlwind Engineering Inc 3761 Linden Ave Se C, Grand Rapids 49548 | (616) 245-4074 |
| Siemens Dematic Usa 507 Plymouth Ave Ne, Grand Rapids 49505 | (616) 913-6200 |