---
type: restriction
id: usps-biological-products-or-medical-preparations-in-nonrefillable-metal-containers
asset: shipping-restrictions-by-class
title: "Biological products or medical preparations in nonrefillable metal containers — Postal shipping restrictions by item category"
sources:
  - https://pe.usps.com/text/pub52/pub52c3_021.htm
source_quote: "Biological Products or Medical Preparations: Nonflammable solutions containing biological or medical products in nonrefillable metal containers preparation that heat could deteriorate may be accepted for domestic surface mail only"
generated: true
harvested: 2026-08-04
stale_after: 2027-08-04
item_category: "Biological products or medical preparations in nonrefillable metal containers"
carrier: "USPS"
restriction_type: "restricted"
scope: "domestic surface mail only"
conditions: "Nonflammable solutions accepted for domestic surface mail only if they comply with Packaging Instruction 2F"
verified: true
unverified_fields: conditions
---
**Item category:** Biological products or medical preparations in nonrefillable metal containers

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic surface mail only

**Conditions:** Nonflammable solutions accepted for domestic surface mail only if they comply with Packaging Instruction 2F

> Biological Products or Medical Preparations: Nonflammable solutions containing biological or medical products in nonrefillable metal containers preparation that heat could deteriorate may be accepted for domestic surface mail only

Source: <https://pe.usps.com/text/pub52/pub52c3_021.htm>