These self-zeroing glass burettes have easy to read blue graduations against a white background.
• 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
• Polyethylene filling tube extends from the top of the burette into the bottle reservoir
• Bottle, screw cap and round base are polyethylene plastic
• Graduation accuracy is Class B