| Business | Phone |
| Black River Plastics 2345 Petit St, Port Huron 48060 | (810) 989-9198 |
| Black River Plastics 2611 16th St, Port Huron 48060 | (810) 985-9730 |
| Modern Plastics Technology 2043 International Way, Port Huron 48060 | (810) 966-3376 |
| Plastech 2133 Petit St, Port Huron 48060 | (810) 987-2434 |
| Port Huron Molded Products Inc 1717 Beard St, Port Huron 48060 | (810) 984-2621 |
| Superb Products Inc 2101 Cypress St, Port Huron 48060 | (810) 982-4950 |
| Serv-Plas Lc 3233 Dove Rd, Port Huron 48060 | (810) 364-4877 |
| Prism Plastics Llc 2040 International Way, Port Huron 48060 | (810) 987-6127 |
| Proformance Mold & Engineering 4544 W Water St, Port Huron 48060 | (810) 985-4287 |