These types of pipettes are generally product of glass or plastic, that has a rubber bulb separate with the pipette entire body to control the stream of liquid. Pasteur pipettes are used to transfer compact volumes of liquids and they are not calibrated or marked with any volumetric recommendations. In https://different-types-of-pipett34443.newsbloger.com/29915256/the-definitive-guide-to-how-many-types-of-pipettes-are-there