Bottle Top Dispenser, 0.25 to 2 ml, DWK Life Sciences (Wheaton) Calibrex™ 520, <±3 to <±0.6% Accuracy, <±0.5 to <±0.10% Precision, 0.05 ml Subdivision, Digital Display, Graduated, Autoclavable, Rotates 360° Angle, Fit Reservoirs with 33 mm Crew Neck Finish