BRAND pipette tips are made of a high-purity polypropylene that is free of additives, pigments, and lubricants that cause sample contamination. All tips are manufactured in a cleanroom under state-of-the-art production conditions and automatically packaged to ensure high quality. Tips can be autoclaved at 121°C (250°F) and 15 psi (1 bar). BIO-CERT sterile tips adhere to ISO 11137 and AAMI guidelines. Filtered tips feature a polyethylene filter. The pore size and filter length control the permeability so aerosols cannot reach the pipette shaft. The filter does not swell so you can easily retrieve your sample by simply actuating the pipette’s blow-out function or by centrifugation.