Description General description • Ideal for aerobic microbiology and cell culture • Flasks complete with blue polypropylene GL45 screwcap with a gas-permeable PTFE membrane that permits gaseous exchange whilst contents remain sterile • Flasks can be autoclaved with the membrane screwcap fastened • Manufactured from Pyrex borosilicate glass for maximum chemical and thermal resistance • The four equidistant baffles provide consistent agitation when used with compatible orbital shakers • Suitable for repeated autoclave cycles at 121 deg. C Legal Information PYREX is a registered trademark of Corning, Inc.