Self-zeroing glass burettes, Class B. Bottle, screw cap and round base made of PE.

• Delivery end is fitted into a plastic push button stopcock which permits drop by drop delivery
• Small screw clamp adjusts drop speed as needed for titration
• PE filling tube extends from the top of the burette into the bottle reservoir

Burette have easy to read blue graduations against a white background. Complete with bottle and base.