| Business | Phone |
| P & R Ind Supply Inc 15 E Palatine Rd 111, Prospect Heights 60070 | (847) 541-4600 |
| Mdm Associates Inc 65 E Palatine Rd 201, Prospect Heights 60070 | (847) 419-0673 |
| Polychem Corp 252 Country Club Dr, Prospect Heights 60070 | (847) 392-9100 |
| Sielc Technologies 65 E Palatine Rd 221, Prospect Heights 60070 | (847) 229-2629 |