Movers will not move hazardous materials. Things like your propane tank, or corrosive materials like bleach need to be packed well or transported separately. Hazardous materials can cause a lot of damage if not transported properly. If you for example do not pack bleach correctly and fail to disclose its location it may leak on a new couch or some clothing. It is better to avoid sending: Corrosives, ammonia, gasoline, bleach, propane tank, paint, kerosene, explosives, fireworks.