Thermo Electron Corporation's Finntip Filter range of pipette tips, provides certified protection against contamination for both sample and pipette. The non-sealing filter prevents the transfer of aerosols from tip to pipette and vice versa, ensuring the integrity of any pipetting function. Produced in a controlled environment with gamma-irradiation, Finntip Filter pipette tips are certified free from DNA, DNase, and RNase. Finntip Filters are ideal for all applications and especially for sensitive procedures such as PCR-based reactions. With extremely low sample retention, the tips are also perfect for pipetting small volumes or valuable compounds. The high-molecular weight, virgin polyethylene of the filters offers superior resistance to aerosol and fluid ingress. Similarly, the virgin polypropylene used in the tips is cast in specially designed molds, producing straight and even sides. These plastics provide excellent chemical resistance and can therefore be used on a wide range of liquids. The non-sealing nature of the filter also allows the safe recovery of a sample after accidental ingress without any loss of integrity.  Although optimized for use with Thermo's Finnpipettes, the entire Finntip Filter product line is compatible with most pipettes.