Eight variable volume MicroPette's in the range. Volume adjustment is selected by turning the thumb plunger mechanism. MicroPette's are calibrated in accordance ISO/DIS 8655. Each pipettor passes a quality control/calibration test and is supplied with a certificate. Fully autoclavable at 121C. Lightweight and ergonomic design. Clear digital display. Integral tip ejector for access into narrow tubes. Easy to calibrate and maintain with tool supplied. Autoclavable tip=cone. Used with 'universal' pipet tips. 3 Year warranty.