| Business | Phone |
| Bair & Goff Sales 1400 Peoples Plz # 215, Newark 19702 | (302) 832-9234 |
| Mechanical Specialties Corp 1103 Drummond Plz, Newark 19711 | (302) 266-0566 |
| Ptm Mfg 303 Markus Ct, Newark 19713 | (302) 455-9733 |
| Thomco Inc 314 E Main St # 401, Newark 19711 | (302) 454-0361 |