The Department of Homeland Security, specifically the U.S. Coast Guard, is seeking quotations for the procurement of two Tube Stacks, identified by NSN 4420-99-799-3111, essential for the 270 WMEC B Class reduction gear lube oil cooler. These components are critical for maintaining the operational efficiency of the Coast Guard's surface forces, ensuring reliable performance in maritime operations. Interested vendors must comply with specific packaging and shipping requirements, including an itemized packing list and adherence to ASTM-D-3951 guidelines, with delivery to the Coast Guard's Surface Forces Logistics Center in Baltimore, MD, by January 30, 2024, at 10:00 PM EST. For further inquiries, vendors can contact Yvette R. Johnson at YVETTE.R.JOHNSON@USCG.MIL.