This wide mouth graduated roller bottle with easy grip cap are manufactured from virgin polystyrene and caps from high density polyethylene material. Both resins meet the USP Class VI requirements for plastic containers and closures. Chemically resistant, heat sealable flexible tubing. One piece seamless construction with printed graduations. Printed lot numbers to aid in product traceability. Sterilized by gamma radiation and certified nonpyrogenic. Easy Grip Cap features large knurls designed for ergonomic handling. Sterile. Disposable. Dimensions: (H x O.D.) 271 x 117mm. Cell Growth Area: 850cm2. Neck O.D.: 45mm. Top Style: Threaded. Recommended Medium Volume: 170 to 255mL. Surface Treatment: Not Treated. Neck Style: Wide Mouth. Cap Style: Easy Grip. Cap Material: High Density Polyethylene. Cap Diameter: 48mm. Cap Color: Orange.