Spectral Tube Power Supply AND Mount

(EHT Generator) This system is easy-to-use and inexpensive, with a variety of safety features that make it suitable for beginning lens. Mount any of the 8 different spectral tubes into the power supply and turn it on. The 26cm long tube are capillary-thin over the middle 10cm, providing sharp bright spectra. FEATURES : Student Safety: The tubes mount from the front of the supply and snap into moulded sockets that fully enclose the conductive ends. The all metal case is electrically grounded.