A burette with a PTFE stopcock is a popular piece of laboratory equipment used in chemistry and analytic experiments.This type of burette is commonly used in titration reactions, where precise measurements are crucial. 

 * Glass burette: made of borosilicate glass.The burette adopts A-level accuracy and there is a clear scale on the glass, which is suitable for experimental use and ensures the accuracy of the experiment. 

* PTFE stopcock: made of polytetrafluoroethylene, a non-reactive and inert material, which ensures no contamination of the chemicals being measured. Its PTFE construction also makes it easy to clean and maintain. 

* Bore tube: To have proper drainage rates, the tips of the burette must have accurate bore tubing