At One Click Purchasing, we are your reliable source for the NSN part O389B manufactured by United States Postal Service. We carry a wide range of popular NSN items on our website, including Holder Binder Label like part number O389B which is listed with the NSN 7510002723044 for easy identification. If you are interested in O389B item, then take the advantage of our online RFQ service, or peruse our website as you see fit to find other items of interest that you may wish to learn more about.