USPS Packaging Instruction 2E

Audible Fire Alarm Systems

An audible fire alarm system powered by a compressed gas is mailable only in domestic mail via surface transportation provided that the system qualifies as a Limited Quantity surface material and all applicable requirements in 342 are met.

Proper Shipping Name

ID Number


Required Packaging

Primary Receptacle
Cushioning Material
Outer Packaging

Labels and markings must be placed on the address side of the mailpiece unless specified differently in 221.1 and 325.1.