Ideal for shaking cell culture applications. All formats include a vent-type HDPE cap with a 0.22µm hydrophobic filter. The plastic material is very resistant and allows an optimal visualization of the interior. Engraved graduation on the side of the flask. Sterilized by beta irradiation and certified free of DNase, RNase and pyrogens. Packed in resealable bags. Certificate of sterilization included (to be downloaded free of charge here)