NMR tubes, the sample or solution vessels for resonance frequency measurement, are extremely precise and are subject to narrow tolerances for straightness, wall thickness and wall thickness distribution.– Close tolerances and accuracy, especially to their straightness, wall thickness and wall thickness distribution – Supplied with cap – – – NMR tubes, the sample or solution vessels for resonance frequency measurement, are extremely precise and are subject to narrow tolerances for straightness, wall thickness and wall thickness distribution.– Close tolerances and accuracy, especially to their straightness, wall thickness and wall thickness distribution – Supplied with cap – – –