temperature resistant borosilicate glass tube designed for gas discharge display and demonstration. Clear, durable construction and purity fill make this item suitable for collectors, educators, and gift purposes. A complimentary base bracket is included for stable display. Key benefits Durable material: borosilicate glass resists heat and thermal shock for reliable handling and long service life. Clean, bright discharge: contains electric light source grade rare gas at 99.999 percent purity for distinct luminous effects when activated. Compatible activation: lights up with ion spheres or Tesla coils, giving flexible options for demonstration and display. Stable and leakresistant: manufacturing quality that will not leak unless the glass is physically broken. Ready to display: complimentary base bracket included for immediate placement or tabletop presentation. Specifications Glass: temperature resistant borosilicate Gas: electric light source grade rare gas, 99.999 percent purity Activation: ion spheres or Tesla coils; a powered Tesla coil produces brighter, more vivid colors Size: diameter 0.78 in x length 4.72 in Size metric: diameter 20 mm x length 120 mm Performance notes Visible luminescence occurs when the tube is placed in the field of an ion sphere or Tesla coil. Brighter and more colorful discharges require a higher powered Tesla coil. The tube is sealed and stable under normal use; do not subject to impact or excessive mechanical stress. Practical use scenarios Classroom demonstration: Show the physics of gas discharge and voltage fields during lectures or lab demonstrations using an ion sphere or Tesla coil. Display piece for collectors or hobbyists: Mount on the included base bracket to showcase the glow effects in a collection or as a conversation piece. Gift for enthusiasts: A compact, visually engaging item for those interested in voltage experiments, science décor, or retro lighting displays. Compatibility and care Designed for use with ion spheres and Tesla coils. Performance will vary by power and frequency of the excitation source. Handle carefully to avoid breakage. The tube will not leak if the glass remains intact. Store in a secure location on the included base bracket when not in use. This product provides a durable, purity gas discharge tube in a compact size for display, teaching, and collection applications.