4.960 +/- 0.006mm OD; 4.200+/- 0-.006mm ID; Wall 0.38mm; 0.0025mm roundness
Wall Variation +/- 0.006mm; Camber +/- 0.003mm; Length 7”
For containment of NMR samples that are sensitive to light. Constructed from Pyrex glass, the tubes are subjected to a high temperature ion exchange reaction to impart the light blocking properties to the glass surfaces.
In order to form stronger bonding, a special optical coating technique is used (as opposed to the usual amberization of other tubes found on the market). A maximum blocking per cent results for wavelengths <600nm.
Results may vary and depend on the nature of the sample.