This is a 100% small business set-aside for an earphone item (NSN 5965-01-056-7225) under a Firm-Fixed Price Indefinite Delivery Contract with a base period of 3 years and 2 option years, using FAR Part 12.201 commercial item procedures. The estimated annual demand quantity is 3,894 units, and delivery is required within 330 days after each delivery order is issued. Interested parties must identify their capability to satisfy the requirement as a commercial item within 15 days of this notice. The item is subject to the Buy American Act, and the approved source is per MIL-DTL-18239E with drawing specifications available through ASSIST. The contract will be awarded based on price, delivery, and performance, with offers to be submitted via DIBBS or email.