The shatterproof Thermo Scientific™ Nalgene auto-zeroing burette delivers reproducible, accurate results (meets US ASTM E287 requirements). Individually calibrated to meet ASTM™ E287 accuracy requirements for reproducible, accurate results Suitable for use with dilute inorganic acids and bases except hydrofluoric acid and ammonium hydroxide For pH values of 1 to 14; compatible with acids in concentrations up to 5% w/w and bases in concentrations up to 30%, covering a wide range of titrants. Supplied as a complete kit with everything needed for the first use: acrylic burette, LDPE squeeze bottle, 91 cm PVC tubing and Burette cover Transparent/GraduatedMeer tonenMinder tonen