The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) requires two water-cooled chiller units to support helium reliquifier systems for NMR magnets. These chiller units are necessary to remove heat generated during the helium reliquification process for two magnets. The work will be performed in Buildings 5 and 8 on the NIH campus in Bethesda, Maryland. No specific budget amounts or timelines are provided in the description. This procurement supports ongoing molecular structure research at the Solid-State NMR and Biomolecular Physics Section.