: The universal filter tips of the Prenger brand are internationally known for their high quality and effectiveness. Thanks to the use of pure polythene, Prenger brand filter tips do not contain any additives that can block enzymatic reactions. The use of polyethylene prevents aerosols and liquids from being drawn into the pipette shaft. This prevents cross-contamination. Because the filter tips are loaded by the machine, the tips are never touched during the entire production and packaging process. The filter tips of the Prenger brand are also free of RNase, DNase, DNA and pyrogens. In addition, all filter tips are sterilized by radiation after the packaging process, as additional protection for biological samples. Prenger's filter tips have an average pore size of 10-40 microns and use a filter made of sintered polyethylene, making the filter tips aerosol resistant with an aerosol barrier that is curvilinear. With a less restrictive pore size, these Prenger filter tips have no noticeable increase in resistance and no impact on pipetting accuracy. These filter tips are certified by Prenger and produce highly accurate measurement results when used with Prenger pipettes and following the instructions in the manuals. Filter tips certified by Prenger meet or exceed minimum standards for: – Absence of pressed seams – Absence of contaminants – Surface smoothness and regularity – Tip tip geometry, dimensions and finish – Pipetting accuracy Prenger filter tips taper to a small opening. Thanks to its slim design and thin, flexible walls, this is an exceptionally flexible tip that aids in sample dispensing. Due to the small opening and the thin wall around the opening, there is a minimum of surface for sample residues to stick to during dosing. Prenger filter tips can be emptied completely for optimum pipetting accuracy. Gradation marks allow for quick and easy volume recognition, eliminating the risk of error. In addition, the Prenger filter tips have a low retention and are designed with a cone-shaped tip opening, which prevents droplet formation at the tip end. Thanks to the improved molding, the Prenger filter tips are universally compatible with the commonly used pipette brands. The compatibility overviews can be downloaded online. Prenger's quality standards ensure that each individual Prenger universal filter tip has passed a strict test and is guaranteed to be free of: – DNA – DNase – RNase – Pyrogens – ATP – PCR Inhibitors