To keep their NMR tubes from spinning out of control, researchers performing NMR spectroscopy require tubes manufactured with uniform precision. These NMR tubes are manufactured with strict adherence to rigorous production and quality standards to assure wall thickness, concentricity and cambre are exact. Available selection includes 3mm, 5mm and 10mm diameters, round or flat bottomed tubes, and specialty tubes equipped with valves or threaded openings. All are constructed of Kimax® borosilicate glass with two grades available to meet multiple scientific needs. Available tube closures include pressure caps comprised of polyethylene or PTFE, and red or white rubber septa.