Starlac Industries manufactures Geissler`s Tubes on Stand, EE-696. Starlac Industries is an ISO 9001: 2000 certified manufacturer and exporter of scientific instruments. Geissler`s Tubes on Stand includes six vacuum tubes of different shapes and designs with various degrees of vacuum inside which display different patterns and discharge phenomenon illuminations, etc. It is housed in a glass or wooden case with rotary switch which helps to connect it with other tubes.