The Wheaton Calibra® Pipettor has a unique, permanently calibrated series of fixed stops, each one corresponding to one volume setting. This system provides accuracy, speed and reliability. Setting adjustments can be made with one click of the cam. Setting deviations are eliminated and sample volumes as small as 0.2 ¬µl can be reproducibly dispensed with a realistic CV. The plunger assembly features a stainless steel or PTFE construction for a high degree of chemical resistivity.