Capacity ml: 100; Graduation Interval ml: 0.20; Tolerance ml: 0.10. Burettes, Automatic Zero, Accuracy as per Class A of IS 1997:2008/EN ISO 385, with Reservoir, Rubber Bellow, and Boroflo Stopcock, With Certificate Complies with IS 1997, EN ISO 385 With automatic zero facility Individually tested for exact volume dispensed at 3 points on the scale Alpha numeric serial number on the article and certificate provide completetraceability Simple operation- To fill Burette apply a slight positive pressure to lower side arm- To set zero, release pressure to allow excess liquid to siphon back into thebottle Burettes manufactured from chemically resistant 3.3 borosilicate glass White enamel graduations With Glass stopcock