---
type: restriction
id: usps-magnetized-materials-with-field-strength-exceeding-0-00525-gauss-at-15-feet
asset: shipping-restrictions-by-class
title: "Magnetized materials with field strength exceeding 0.00525 gauss at 15 feet — Postal shipping restrictions by item category"
sources:
  - https://pe.usps.com/text/pub52/pub52c3_028.htm
source_quote: "Materials with a field strength over 0.00525 gauss at 15 feet are nonmailable in domestic and international air transportation under any circumstances."
generated: true
harvested: 2026-08-04
stale_after: 2027-08-04
item_category: "Magnetized materials with field strength exceeding 0.00525 gauss at 15 feet"
carrier: "USPS"
restriction_type: "prohibited"
scope: "all domestic and international air transportation"
conditions: "Prohibited from air transportation under any circumstances"
verified: false
unverified_fields: conditions, item_category
---
**Item category:** Magnetized materials with field strength exceeding 0.00525 gauss at 15 feet

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** all domestic and international air transportation

**Conditions:** Prohibited from air transportation under any circumstances

> Materials with a field strength over 0.00525 gauss at 15 feet are nonmailable in domestic and international air transportation under any circumstances.

Source: <https://pe.usps.com/text/pub52/pub52c3_028.htm>