NMR tubes are designed for routine use in all nuclear magnetic resonance spectroscopy procedures, and they are guaranteed to fit tightly in any spinner turbine and have zero NMR background. Tubes are uniformly thick and well-balanced to ensure that they spin at regular rates within the NMR spectrometer. Many models of these tubes are made from borosilicate glass and are available in various lengths and outer diameters. NMR tubes are use primarily with small samples dissolved in an appropriate solvent.