Description_x000D_ General description_x000D_ Corning polystyrene roller bottles are treated for optimal cell attachment and feature superior optical clarity and seamless one-piece durable construction. Expanded surface roller bottles feature a ribbed design that provides twice the growth surface with the same exterior dimensions as 850 sq.cm. bottles. PET roller bottles feature optically-clear rigid side walls for optimal robotic handling and molded in graduation marks for easy volume reference. All bottles are certified non-pyrogenic and have individually printed lot numbers to aid in product traceability. Vent cap roller bottles are available for applications requiring continuous gas exchange. Bottles are sterilized by gamma radiation. Strap packaging facilitates large volume roller bottle handling._x000D_ Legal Information_x000D_ Corning is a registered trademark of Corning, Inc.