| Business | Phone |
| Rad-Con Inc 560 Dover Center Rd, Cleveland 44140 | (440) 871-5720 |
| Production Heating Equipment Po Box 241021, Cleveland 44124 | (440) 605-1675 |
| International Refractory Svc 3515 E 71st St, Cleveland 44105 | (216) 641-7667 |
| North American Manufacturer Co Ltd 4455 E 71st St, Cleveland 44105 | (216) 271-6000 |
| Lanly Co 26201 Tungsten Rd, Cleveland 44132 | (216) 731-1115 |