Used for titration in labs for years, these have found some new uses in other areas. Burettes are generally used to accurately dispense oils and liquids. Also, many engine builders use these to match cylinder heads for high performance engine building. This is a borosilicate glass tube body with 0.10mL subdivisions and accurate to + or - 0.10 ml (cc) for the 50mL. It has a state of the art" PTFE rotoflow stopcock valve. This stopcock ensures a leakproof seal, finer flow control, elimination of lubrication and absence of plug seizure. This style of burette is intended for delivery of a more precise volume. They are designed for conditions ranging from general purpose to high vacuum. This burette provides more control and the ability for easy one-handed operation.