This is a sole-source style procurement for 4 units of a flight-critical item, requiring Government source approval before award due to insufficient technical data for full and open competition. Only sources previously approved by the Government have been solicited, and new sources must submit the detailed Source Approval Information Brochure data with their offer or they will not be considered. If your source approval request cannot be processed in time, award may proceed based on Fleet support needs. Delivery is FOB Origin, and the acquisition may be subject to Free Trade Agreements and/or the WTO Government Procurement Agreement depending on included DFARS clauses. No budget amount is specified.