| Business | Phone |
| Nuway Filters Inc 3013 Griffith St, Charlotte 28203 | (704) 525-4011 |
| Bruce Air Filter Co 2619 West Blvd, Charlotte 28208 | (704) 391-7474 |
| Textile Screens Inc 6148 Brookshire Blvd # K, Charlotte 28216 | (704) 392-5564 |
| Domnick Hunter Inc 5900 Northwoods Pkwy # B, Charlotte 28269 | (704) 921-9303 |
| H C Warner Inc 350 Crompton St, Charlotte 28273 | (704) 588-3388 |