Hydrophobic surface is ideal for non-adherent cultures and hybridomas. Barrier filter (0.2 µm) allows gas exchange without risking contamination. Ideal for infectious materials. Wide, canted neck aids pipetting or cell scraping. White caps. RNase-, DNase-, human DNA-free; non-pyrogenic and non-cytotoxic. Radiation sterilized polystyrene. Greiner Bio-One.