Tips 10UL Fltr RT-10FLR - Discontinued Product Low-retention tips in racks.. Racked tips, 10 μL max. volume, universal-fit, low-retention, pre-sterilized, filter, 960 tips in 10 racks of 96 (RT-10FLR) Superhydrophobic for greater accuracy. The superhydrophobic surface allows the sample to move effortlessly through the the tip.