The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of 41 units of a Calibration Kit, CAB, identified by NSN 7R-4920-012606870-EY. This procurement is critical as the item is flight critical, requiring government source approval prior to contract award, and only previously approved sources will be considered for this solicitation. Interested parties must submit their proposals along with the necessary source approval documentation within 45 days of this presolicitation notice, with the understanding that the government may proceed with award based on fleet support needs if new source approvals cannot be processed in time. For further inquiries, interested vendors can contact Katlyn M. Galetto at (215) 697-6549 or via email at katlyn.galetto@navy.mil.