Borosil Reusable Class B Volumetric Pipettes are with One Mark for accurate measurement and decanting of liquid. Calibrated for delivery (TD). Manufactured with sturdy, consistent wall thickness. Reusable. Uniform inner bore diameter for smooth flow. Beveled tips resist chipping. Pipettes can be autoclaved and, if necessary, flame-sterilized. Borosil Volumetric Pipettes are graduated for delivery from the capacity mark to the tip, without "blowing out" the droplet remaining in the tip after dispensing. Borosil Class B Volumetric Pipettes comply with ASTM E-969-02. Available in sizes ranging from 1mL to 100mL. 30mL and 40mL options are not covered by ASTM standards. Manufactured from the same USP Type 1 borosilicate glass that North American scientists have come to trust, Borosil Laboratory Glassware offers unparalleled mechanical strength, clarity, and reliability at competitive prices.