4 reasons to choose PIPETMAN L fixed High quality results Safety: no risk of error of delivered volume Extremely comfortable Easy to use Graduated Cover Can be readjusted by users in the laboratory for dense and viscous fluids (once reset, the new volume cannot be accidentally changed). Push Button The bottom part of the push button is colored in blue to make it easy to recognize between variable and fixed model. Plastic Tip Ejector The pipette is available only with plastic tip ejectors. For a convenient access to the serviceable parts, the tip ejector is equipped with the easy-release clip ejector.