Borosilicate glass with blue and white Schellbach striping for repeatable accuracy. Buret is designed to be self-zeroing, with 0.25” O.D. overflow and filling tubes and a three-way PTFE stopcock. Scale is black ceramic enamel. Calibrated to be read at the apparent meniscus. Use of the “true” meniscus may result in a lesser volume being dispensed from zero.