| Business | Phone |
| Holland Applied Technologies 7050 High Grove Blvd, Willowbrook 60527 | (630) 325-5130 |
| Maas Polishing Systems 7101 S Adams St 3, Willowbrook 60527 | (630) 654-4743 |
| Strauch Chemical Distributors 241 S Frontage Rd 34, Willowbrook 60527 | (630) 323-4363 |