Kimble kimax straight bore burettes used for general purpose titrations requiring traceable volumetric accuracy. Precision bore buret is permanently marked with an individual serial number and is traceable to nist standards supplied with a certificate of graduation accuracy delivery stem of the 10 ml size is 115 mm long to meet requirements of potentiometric titration burets (astm d664) supplied with a chemically-resistant, self-lubricating ptfe stopcock plug and a kim-kap dust cap easy-to-read durable white ceramic enamel scale funnel fill style buret replacement 2 mm straight bore stopcock plug is 821001-0002 designed from astm specification e287, class a requirements manufactured to the specifications found in astm e694 calibrated to the accuracy requirements found in astm specification e542 manufactured from 33 expansion, expansion, low extractable borosilicate glass conforming to usp type i and astm e438, type i, class a requirements. Warning: this product can expose you to chemicals including tetrafluoroethylene, which are known to the state of california to cause cancer. Prop 65 warning