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USPS Packaging Instruction 10A

Small Quantity Provision

Some types of hazardous materials, as permitted in 336 and 49 CFR 173.4, may be prepared for mailing using the “small quantity” provision. The small quantity provision, like the ORM–D materials category, is unique within the United States, and its use is prohibited in international mail.

Proper Shipping Name and ID Number

Prototype Testing Requirement

Mailability

Required Packaging

Inner Receptacle
Absorbent and Cushioning Material
Secondary Packaging
Outer Packaging
Marking