| Business | Phone |
| Crown Group Grand Rapids Plant 601 1st St Nw, Grand Rapids 49504 | (616) 454-9439 |
| Enamelite Industries Inc 3829 Roger B Chaffee Mem Dr Se, Grand Rapids 49548 | (616) 452-1591 |
| Miller Products 601 1st St Nw, Grand Rapids 49504 | (616) 454-8341 |