With removable PTFE stopcock, fast to dismantle and easy to clean. Simple repair, all individual components replaceable. BLAUBRAND®: Boro 3.3. Class AS, DE-M marking, DIN EN ISO 365, calibrated to deliver (TD, Ex). Burette tube with Schellbach stripe, stopcock with precision tip, incl. batch certificate. SILBERBRAND: AR-Glas®. Error limits acc. to class B, DIN EN ISO 365, calibrated to deliver (TD, Ex). Burette tube with Schellbach stripe, stopcock with precision tip. Reduced distances between subdivision marks. SILBERBRAND amber glass: Borosilicate glass 5.4. 25 ml: error limits acc. to class B, DIN EN ISO 365, calibrated to deliver (TD, Ex). 50 ml: DIN EN ISO 365, class B. Burette tube with white graduation, stopcock with precision tip. Reduced distances between subdivision marks. With removable PTFE stopcock, fast to dismantle and easy to clean. Simple repair, all individual components replaceable. BLAUBRAND®: Boro 3.3. Class AS, DE-M marking, DIN EN ISO 365, calibrated to deliver (TD, Ex). Burette tube with Schellbach stripe, stopcock with precision tip, incl. batch certificate. SILBERBRAND: AR-Glas®. Error limits acc. to class B, DIN EN ISO 365, calibrated to deliver (TD, Ex). Burette tube with Schellbach stripe, stopcock with precision tip. Reduced distances between subdivision marks. SILBERBRAND amber glass: Borosilicate glass 5.4. 25 ml: error limits acc. to class B, DIN EN ISO 365, calibrated to deliver (TD, Ex). 50 ml: DIN EN ISO 365, class B. Burette tube with white graduation, stopcock with precision tip. Reduced distances between subdivision marks.