The National Institute of Standards and Technology (NIST) is seeking quotations for the procurement of Luxfer brand aluminum gas cylinders, specifically eighty (80) non-SGS cylinders with packless CGA-350 brass valves, and an optional maximum of fifty (50) additional empty cylinders with packless CGA-660 stainless steel valves. This procurement is critical for the production of Primary Standard Materials (PSMs) used in accurate gas measurement, particularly for carbon monoxide, nitric oxide, and sulfur dioxide, which are essential for scientific research and regulatory compliance. Interested contractors must submit firm-fixed price quotations by 11:00 a.m. Eastern Time on September 23, 2024, to the designated Contract Specialist, Tish Walker, at latish.walker@nist.gov, adhering to all specified requirements and provisions outlined in the solicitation documents.