The United States Government Publishing Office (GPO) is seeking proposals to purchase high-volume TWIC PIN Mailers for its secure credential issuance system. The contract will be an Indefinite Delivery/Indefinite Quantity (IDIQ) type with Firm-Fixed-Price delivery orders. The government intends to award one contract to the responsible offeror with the lowest evaluated price meeting technical acceptability standards. The PIN Mailers are critical for mailing preset PINs required to activate TWIC cards used for accessing secure federal facilities and networks. Performance of services location and specific budget amounts are not detailed in this description.