Reference Source

Combustible liquids — domestic surface

For Combustible liquids, item category is Combustible liquids — domestic surface; carrier is USPS; restriction type is restricted; scope is domestic mail via surface transportation; conditions is Mailable if qualify as Limited Quantity and consumer commodity materials and meet criteria; Packaging Instruction 3B must be followed, recorded from its source on 2026-08-04.

Item category
Combustible liquids — domestic surface unconfirmed
Carrier
USPS our reading
Restriction type
restricted our reading
Scope
domestic mail via surface transportation our reading
Conditions
Mailable if qualify as Limited Quantity and consumer commodity materials and meet criteria; Packaging Instruction 3B must be followed unconfirmed
Sourcepe.usps.com
Verified2026-08-04
Review by2027-08-04
DatasetPostal shipping restrictions by item category

Values marked unconfirmed are shown, but we could not tie them to the quote below: Conditions, Item category. Read the quote and judge them yourself.

Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.

What the source says

Domestic Mail via Surface Transportation: Combustible liquids are mailable if they qualify as Limited Quantity and consumer commodity materials

pe.usps.com, retrieved 2026-08-04

Source

Last verified against source: 2026-08-04. Scheduled for re-check by: 2027-08-04. This page as Markdown · OKF concept · full dataset as JSON.