The Department of Commerce, specifically the National Institute of Standards and Technology (NIST), is seeking proposals for the procurement of an Ultra High Vacuum (UHV) Pump Cart, aimed at supporting advanced measurement technologies for superconducting nanowire single photon detectors. The UHV pump cart must meet stringent specifications, including achieving an ultimate pressure of less than 10^-8 hPa and include essential components such as a turbomolecular pump, backing pump, and pressure gauge, all while being mobile for laboratory use. This procurement is critical for enhancing U.S. measurement science and ensuring compliance with industry standards. Interested small businesses must submit their firm-fixed-price quotations by 5:00 PM Eastern Time on June 14, 2025, to Cielo Ibarra at cielo.ibarra@nist.gov, with the contract expected to be awarded shortly thereafter.