Volumetric pipette

[2] It is calibrated to deliver accurately a fixed volume of liquid.

These pipettes have a large bulb with a long narrow portion above with a single graduation mark as it is calibrated for a single volume (like a volumetric flask).

A specialized example of a volumetric pipette is the microfluid pipette (capable of dispensing as little as 10 μL) designed with a circulating liquid tip that generates a self-confining volume in front of its outlet channels.

[3] Pyrex started to make laboratory equipment in 1916 and became a favorite brand for the scientific community due to the borosilicate glass's natural properties.

These included strength against; chemicals, thermal shift, and mechanical stress.