Gilson pipetman pipet pipette P20 20 ul variable volume mis1

used Gilson pipetman. model P20 (2-20ul) in the old style - tip ejector and the black rubber ring on the dialing ring are missing. though it doesn't influence the pipet performance. The pipettors sold have been used only with non-radioactive and non-biohazardous materials. Also. all pipettors have been tested to work properly- I have measured the aliquottes on a Mettler scale. If you are not satisfied. you can return the product within 14 days for a full refund excluding shipping expenses.