The pipettor has permanently calibrated fixed stops, each one corresponding to a single volume setting. The 2.0 ml model also includes an adapter for use with Pasteur pipets. An integral tip ejection system allows fast and safe macrotip removal, for simple one-handed operation. Fully autoclavable. Optional paper filters can be used with polypropylene macrotips to prevent cross contamination when pipetting biological materials and other contaminants. Warranty: 2 years.