Filter pipette tips are used for protection your pipette. Application to PCR, sequencing and other techniques involving the use of vaporous, radioactive, biohazardous or corrosive materials. Virgin polyethylene filters. Ensure that all aerosols and liquids are prevented from entering the pipette. Packaged in rack and pre-sterilized. The filter pipette tip is best price and great quality. DNase/RNase free. Autoclavable.