It will arrive in the U.S. in about 10 days High temperature resistant high borosilicate glass case, size: diameter 0.78in × length 4.72in, diameter 20mm × length 120mm Electric light source grade rare gas purity of 99.999% Activate luminescence with ion spheres or Tesla coils Suitable for collection, display, teaching, gift Complimentary base bracket A high-powered Tesla coil is required to activate brighter glowing colors. High purity glass seal gas High vacuum, first use mechanical vacuum pump to pump to vacuum, high temperature to remove the impurity gas inside the glass under vacuum, then use diffusion pump to pump to high vacuum. And then filled with a small amount of 99.999% purity (electric light source grade) rare gas. The glass is made of high temperature resistant high borosilicate glass, which is resistant to high temperature and high purity. It will not release impurities to pollute the gas. 1, Tesla coil activation, different Tesla activation effect is not the same. 2, EDM detector activation of chromatography is the most accurate. 3, ion ball activation brightness is low, if you want ion ball activation, neon gas is optimal Oxygen activation conditions than other gases, not recommended for ion ball activation, activation for light gray suitable for dark observations. Nitrogen and air are closer to each other in excitation color, and air is more vivid than nitrogen when the excitation intensity is sufficient.