S-ProScience Cell Culture Flasks are available in various sizes, with cell growth areas ranging from 25cm2 to 225cm2. You can choose between tissue culture treated or non-treated flask, available with a vent cap or plug seal cap to meet your specific requirement.• Made of high clarity, 100% virgin polystyrene• Frosted writing area and clear graduations • Anti-tip skirt design on the back for easy stacking• Notched bottom for slip free stacking• DNase/RNase free, non-pyrogenic and non-cytotoxic• Sterilized by E-beam irradiation• Sterile plastic bags, vacuum packaging, re-sealable Bag