ep Dualfilter T.I.P.S SealMax filter tips are designed to protect samples and pipettes against contamination through aqueous sample liquid during accidental over-pipetting, as well as against contamination through aerosols and biomolecules. These filter tips combine two-phase filter protection with a fluid and moisture barrier and reduce the risk of the sample liquid being inhibited after contact with the filter. When in use, the tips initially seal as the aqueous liquid passes through the first hydrophobic filter layer, built to retain drops and splashes. The sample then passes into a second filter layer, which creates a barrier against the liquid. When a single-channel pipette is used, a release mechanism can enable the recovery of aqueous liquids via continued pipetting.