Thermo Scientific 250 m 102mm Tall Tip Extended Lenght Filter Tips Racks of 12 Thermo Scientific 250 m 102mm Tall Tip Extended Lenght Filter Tips Racks of 120 Tips Protect your samples and pipettes from contamination with Thermo Scientific Matrix Filtered TallTip Extended-Length Pipette Tips, which allow access to the bottom of test tubes, reagent bottles, flasks, and other vessels without touching the barrel of your pipetter against the side of the tube. Non-beveled, narrow-tip ends to provide a cleaner touch-off of sidewalls for greater precision. The hydrophobic filters effectively block aerosols and ensure that no particulates contaminate samples.