This unrestricted acquisition covers NSN 4820-01-271-7918, a fluid pressure regulating valve, with an estimated annual demand quantity of 15 units. The item is subject to the Buy American Act and will be procured as a firm-fixed-price, indefinite delivery contract with a 3-year base period and two option years under FAR Part 12.201 commercial procedures. The approved source is Leslie Controls, Inc., but all responsible parties may submit offers. Delivery is required within 548 days after issuance of each delivery order. The solicitation will be posted on DIBBS, and offers must be submitted in English and U.S. dollars.