Wilmad-Labglass Thin Wall Precision NMR Sample Tube, 7" L, 500 Mhz, Pack Of 5 | Cole-Parmer

5 mm Thin Wall Precision Quartz NMR Sample Tube 7" L, 300Mhz

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Wilmad-Labglass NMR Economy Sample Tube, Borosilicate Glass, 4.947 mm OD X 7" L, 300 Mhz, Pack Of 5 | Cole-Parmer