Proper shipping name, UN number, class/division, quantity, and packaging.
A specialized tech firm in Germany needs to ship 500 prototype lithium-ion batteries to a manufacturing partner in California immediately. These batteries are powerful, dense, and classified as "Dangerous Goods" (Class 9) because they pose a fire risk. iata dangerous goods declaration form
The —or more formally, the Shipper's Declaration for Dangerous Goods —is essentially the "passport" and "medical history" for hazardous materials traveling by air. Proper shipping name