The Modular Automatic Burette Concept! Fast to dismantle and easy to clean. Easy to repair - all individual components replaceable! Class AS, DE-M marking Boro 3.3, detachable PTFE stopcock. DIN EN ISO 385. Calibrated to deliver (TD, Ex). All BLAUBRAND® automatic burettes are supplied with a batch number and an accompanying batch certificate in the original packaging. On request, they are also available with an individual certificate, USP individual certificate or DAkkS calibration certificate.