CO2 anesthetic bubbler.
 The use of the bubbler allows both the humidification of the CO2 so that the tissues of the queen subjected to insemination do not dry out and, allows a precise regulation of the flow of anesthetic gas CO2. A correct regulation of the flow is 2 bubbles per second.
 With the supplied tubes and fittings, the connection between the cylinder and the bubbler and between the bubbler and the insemination tool is very simple.