| Business | Phone |
| Bernard Beier Co Po Box 99, Marine City 48039 | (810) 765-4300 |
| Butler Plastics Co 766 Degurse Ave, Marine City 48039 | (810) 765-8811 |
| Worswick Mold & Tool Inc 6232 King Rd, Marine City 48039 | (810) 765-1700 |
| Seaway Plastics Corp 814 Degurse Ave, Marine City 48039 | (810) 765-8864 |