It is a long, slender tube at one end and the other end has a rubber. Use the dropper to suck reagent bottle to drip into a test tube filled with other substances. In order to see the reaction of the reagent.
The glass tube is a long taper one end and the other side with rubber. The eyedropper is used for absorbing reagent from a bottle to drip into other substances that test tube packaging. In order to see the reactions of chemical reagent.
There is a glass tube on the end of the slender and long on the other one is used for rubber suction tubes dripping from the bottle to the agent drops the test tubes in a container terminal is to be used in the different reactions to the chemical agents.