This IFB seeks a single 5-year firm-fixed-price IDIQ contract for Testing Kits, Aviation Petroleum (NSN 6630-01-558-5109; Part No. 57K6311), with schedule quantities estimated only. The procurement is full and open, and a Technical Data Package applies under distribution code C, limiting access to government agencies and their contractors. Bidders must access the TDP before submitting a bid, or the bid will be rejected. The government will evaluate bids without discussions and expects all necessary information, fill-ins, and representations to be included in the bid. Bids must remain valid for at least 180 calendar days.