Chemical-resistant PTFE O-rings and seals allows these pipettors to be used with solvents. Fully autoclavable, adjustable volume pipettor features one-touch calibration and enhanced ergonomics. Enhanced UV resistance provides added protection from biohazardous elements. Easily adjust the pipette volume by turning the colored dial, and lock dial feature prevents accidental volume changes during use. Separate tip release button eliminates accidental release.