Pipette button The centrally mounted, large pipetting button allows uniform smooth movement of the piston. Human engineering design True one -handed operation for both right -and left -handers Calibration adjustment without tools ! The easy calibration technique makes it easy Maximun protection Completely autoclavable at 121?(20min) without disassembly-for Maximun protection from contaminzton Volume coded Easy distinguish Slim pipette shaft The slim shaft allows pipetting into narrow vessels,without removing the tip ejector. Maximum compatibility New tip cone design offers excellent fit with Pipette tips and broadest compatibility with tips from most other Manufacturers.