Accurately measure more than one volume by using Thermo Scientificâ„¢ Samcoâ„¢ Graduated Transfer Pipettes. Single-unit design features a built-in pipette bulb that eliminates need for plugging, packaging, autoclaving while preventing cross-contamination. - See more at: http://www.thermoscientific.com/en/product/samco-graduated-transfer-pipettes.html#sthash.RgrUbsvR.dpuf