--- type: restriction id: usps-radioactive-instruments-and-articles-un2911-clocks-electronic-tubes asset: shipping-restrictions-by-class title: "Radioactive instruments and articles (UN2911) — clocks, electronic tubes — Postal shipping restrictions by item category" sources: - https://pe.usps.com/text/pub52/pub52c3_026.htm source_quote: "UN2911: Low-risk items like clocks, electronic tubes, or similar devices with radioactive materials in gas or solid form, classified as \"excepted package\" for simplified handling under 49 CFR § 172.101." generated: true harvested: 2026-08-04 stale_after: 2027-08-04 item_category: "Radioactive instruments and articles (UN2911) — clocks, electronic tubes" carrier: "USPS" restriction_type: "restricted" scope: "domestic mail via surface transportation" conditions: "Mailable if activity does not exceed limits in Exhibit 347.22; classified as excepted package for simplified handling per 49 CFR 172.101; must follow Packaging Instruction 7A" verified: true unverified_fields: carrier, conditions, restriction_type, scope --- **Item category:** Radioactive instruments and articles (UN2911) — clocks, electronic tubes **Carrier:** USPS **Restriction type:** restricted **Scope:** domestic mail via surface transportation **Conditions:** Mailable if activity does not exceed limits in Exhibit 347.22; classified as excepted package for simplified handling per 49 CFR 172.101; must follow Packaging Instruction 7A > UN2911: Low-risk items like clocks, electronic tubes, or similar devices with radioactive materials in gas or solid form, classified as "excepted package" for simplified handling under 49 CFR § 172.101. Source: