USPS Packaging Instruction 2F

Biological Products or Medical Preparations

A product or preparation in a nonrefillable metal primary receptacle charged with a nonflammable solution containing biological products or a medical preparation that could deteriorate by heat may be accepted in the domestic mail via surface transportation only provided that the item qualifies as a Limited Quantity surface material, and all applicable requirements in 342 are met.

Proper Shipping Name

ID Number


Packaging Requirements

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.