The Spectrum Tube – Nitrogen produces bright, well-defined spectra when used.
The Spectrum Tube – Oxygen produces bright, well-defined spectra when used.
 
Each glass tube is 24 cm long and narrowed to capillary width for about 10 cm in the centre.
 
Sealed metal wires hold the electrodes and are welded to metal caps which have a loop for convenient hook-up to wire connections.
 
This spectrum tube is compatible with Spectrum Tube Power Supply – Adjustable.
Also compatible with  Induction Coil Ruhmkorf – 80mm Spark.
 
Units: Each.
Total length: 260mm approx.
Diameter of each end: 20mm approx.
Diameter of capillary section of tube: 7mm approx.