Cell culture bottles filter screw cap, 175 cm², 550 ml, 20-45 mlCell cult. bottles w. filter screw clos., PS, sterile, membrane screw cap, 550 ml Material: PS. Sterile Hydrophobic membrane (pore size 0. 2 m) for minimal risk of contamination and optimal gas exchange. High, angled bottle neck reduces the risk of media contact with the inside of the screw cap and therefore provides an additional layer of protection against contamination. Cell layers are easy to reach with the cell scraper Optimal access with pipette