These universal fit filtered pipet tips are designed for research grade pipettors. Axygen® pipet tips are ideal for molecular and microbiology applications in which carryover contamination can invalidate results. The filter position allows for sufficient space between the sample and filter at the maximum rated volume and in case of overpipetting, the sample can be easily recovered by dispensing. Filters are made from polyethylene and contain no PCR inhibitors. Hydrophobic filter barrier Certified RNase, DNase, and endotoxin free. Pre-sterilized. Racked. Corning Axygen® #: TF-150-R-S.