The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure 10 units of a specific fan, model NSN 7R-4140-014249956-VH, under a presolicitation notice. The procurement is limited to a single source as the required technical data or manufacturing knowledge is not available for alternative suppliers, necessitating compliance with DoD-STD-100 for acquisition. These fans are critical components used in various military applications, emphasizing the importance of sourcing from qualified manufacturers. Interested parties must express their interest and capability within 45 days of this notice, and any inquiries should be directed to Joshua J. Seltzer at (215) 697-2849 or via email at joshua.j.seltzer@navy.mil.