Seal-Off NMR tubes provide the best security against sample degradation during the investigation of volatile, air-sensitive, or toxic compounds. Constriction opening is 0.5 to 2.0mm and is located 1.8" from the cap end of the tube, leaving a 7.2" long tube after seal-off. Tubes are supplied with a polyethylene cap and have a sandblasted marking spot for easy identification. Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements.
- OD 5mm
- Wall thickness .375mm