CellPro Filtration Flasks are available in filter medium PES 0.22µm and 0.45µm. The screw-on funnel has a lid, the filtration section has a graduated connection that fit multiple hoses, and the receiving bottle has indentations for easy gripping and a separate cap. Both the funnel and receiver feature engraved graduation marks to ensure accuracy, and are gamma sterilized, pyrogen free.