Please see the relevant section of publication 52 for more details.

Related Products

Toy Propellant Devices

The proper shipping name for a mailable toy propellant device is “model rocket motor” or “igniter.” A device that is assigned identification number NA0323 or UN0454 and classed as a Division 1.4S explosive is eligible for mailing in domestic mail via surface transportation only, provided that all requirements are met and the device is properly package. See specifications in 341.22a.


Required prior written Authorization must be obtained from:

Director, Product Classification 
USPS Headquarters

475 L'Enfant Plaza SW, RM 4446                                                                 

Washington, DC  20260