Description General description • Complies with ISO 385 • Graduations and inscriptions in blue enamel • With funnel top to make filling easier and safer • Each burette has a +30s waiting time before final reading can be taken • Manufactured from chemically resistance borosilicate glass • Grease-free interchangeable PTFE key with 1.5mm bore Schellbach burette tube with vertical white stripe and central blue ribbon • Facilitates accurate reading of meniscus • exact position of the meniscus is clearly defined where the blue ribbon splits into a wide and narrow band Legal Information PYREX is a registered trademark of Corning, Inc.