Five Star DEF 1 Gallon Reusable DEF JUG with 38/400 DEFSPOUT for Storing DEF 1 gallon DEF Certified reusable DEF JUG WITH our FSD3840012 38/400 DEF SPOUT that you can fill with DEF at a Service Station or Truck Stop and safely carry on your vehicle. Five Star DEF FSD-38/400-012 DEFSPOUT included Vented with removeable vent cap for fully sealed storage. ISO 22241-3 DEF Specification Compliant Labels, Materials, and Cleaning Convenient handle for ease of dispensing in your vehicle. Empties in under 30 seconds.