Borosil 2121006 burettes fitted with boroflo GP is generally used in titration process. It comes with boroflo with PTFE key that is highly resistant to chemical attack. No need to lubricate it as PTFE key is used. These burettes comes with highest quality standards according to IS 1997 and ISO 385. It supplied with PTFE stopcock, boroflo stopcock and straight bore glass stopcock.