| Business | Phone |
| Alumilite Corp 315 E North St, Kalamazoo 49007 | (269) 488-4000 |
| Sci 8269 W Main St, Kalamazoo 49009 | (269) 372-7788 |
| Engineered Material Sales 303 W Walnut St, Kalamazoo 49007 | (269) 344-1085 |
| Plastic Sheets Kalamazoo 49009 | (269) 381-1330 |
| Summit Polymers Inc 6717 N Sprinkle Rd, Kalamazoo 49004 | (269) 324-9323 |
| Ge Polymershapes 8233 Neptune Dr, Kalamazoo 49009 | (269) 342-8733 |
| Jarvis Pemco 1872 Ravine Rd, Kalamazoo 49004 | (269) 349-9631 |