Borosil Boroflo Burettes ("Burets") provide users with the ultimate flow control. Replaceable Boroflo PTFE Screw-Thread Keys create a chemically-resistant, leak-proof system which requires no lubrication whatsoever. Each Borosil Burette is calibrated by automatic laser calibration. Certificates can be downloaded by visiting Borosil, or by downloading the Borosil app. Avail. from 10mL to 100mL. Burettes comply with IS 1997: 2008/EN ISO. In collaboration with Borosil Glass Works, Foxx Life Sciences is proud to bring the outstanding quality of Borosil Type 3. 3 Borosilicate glassware to North America for the first time. Manufactured from the same USP Type 1 borosilicate glass that North American scientists have come to trust, Borosil Laboratory Glassware offers unparalleled mechanical strength, clarity, and reliability at competitive prices. And thanks to a unique annealing process, Borosil Glassware is stress-free and incredibly resistant to thermal shock.