Customer Support Ruling

Scientific Instruments - Library Mail

UDATED June 2014

PS-112 (273.4.3)

This CSR discusses the eligibility of scientific instruments at Library Mail prices.

Domestic Mail Manual (DMM) 273.4.3*, states that scientific or mathematical kits, instruments, or other devices may be mailed at the Library Mail price when sent to or from schools, colleges, universities, public libraries, museums, and herbariums, and to or from nonprofit religious, educational, scientific, philanthropic (charitable), agricultural, labor, veterans or fraternal organizations.

Thermometers, barometers, anemometers and similar items qualify under 273.4.3 for Library Mail prices when they are mailed under the conditions prescribed therein.

*See also DMM 173.5.3.

Sherry Suggs


Mailing Standards

Headquarters, US Postal Service

Washington, DC 20260-3436