Calibrated "to deliver" at 20°C, these borosilicate glass pipettes have a permanently colored amber scale with the zero line at the top. The small amount remaining in the tip, after completion of free delivery, is blown out and added to the main delivery volume (ground band indicator at top). The 5, 10, and 25mL pipettes have openings of reduced diameter.
Reference: ASTM E 1044, Class B
NOTE: Do not pipette by mouth. Please use a mechanical device.