| Business | Phone |
| Three 60 Corp 1201 Fendt Dr, Howell 48843 | (517) 545-3600 |
| Synventive Molding Solutions 7910 Wiggins Rd, Howell 48855 | (517) 545-4226 |
| Pinckney Molded Plastics 3970 Parsons Rd, Howell 48855 | (517) 546-9900 |
| Plastech 1502 N Old Us Highway 23, Howell 48843 | (810) 632-9327 |
| Gilreath Manufacturing Inc 1045 Durant Dr, Howell 48843 | (517) 546-5251 |
| Key Plastics Llc 1301 Mcpherson Park Dr, Howell 48843 | (517) 546-1900 |