Spectral Tube Set with Voltage Source (for high school) Manufacturer,Supplier and Exporter in India

Set of 5 tubes with H2, O2, Ar, CO2, Ne, with two electrodes at the ends, length about 200 mm.
When applying a high voltage there is an electrical discharge into the gas atmosphere.
Tubes are narrowed in the middle to allow spectroscopic observation of the emission lines
The set should include a high voltage source with adaptable support for connecting the tubes
When connecting the source, there is an electrical discharge through the tube and the internal gas is illuminated
Power consumption : 4,5 W