Corning 431255  Polycarbonate 2,000mL Sterile Erlenmeyer Flask with Polypropylene Vented Screw Cap (Case of 6) 2,000mL sterile, clear, impact-resistant United States Pharmacopeial Convention (USP) Class VI polycarbonate Erlenmeyer flask for shaker cell culture applications and storing chemicals or mixtures Polypropylene vented screw cap with a 0.2m hydrophobic polytetrafluoroethylene (PTFE) membrane for sterile gas exchange Autoclavable flask and cap (one cycle only) withstand temperatures up to 135 degrees C (275 degrees F) Flask is radiation sterilized with the highest sterility assurance level (SAL) of 1E-6, individually packaged, and certified non-pyrogenic Flask measures 11.33" high with cap and has a 6.40" base diameter and 1.76"neck opening; cap is 2.12" in diameter