"20mL Volumetric Pipet. Volumetric pipettes are labware useful in extracting a small amount of wine or other liquid accurately to be used in wine testing. Allows for extremely accurate measurement of a volume of solution. These pipettes have a large bulb just above a long narrow portion and are calibrated for a single volume. These ""Class B"" transfer pipet are made from borosilicate glass in compliance with ASTM specification E-969 for Class B pipettes. Color coded. Calibrated to deliver. Printed with durable amber markings."