This Corning rectangular cell culture flask with canted neck and vent cap has an available growth area of 225sq cm. It is manufactured from optically clear virgin polystyrene, and has been treated with a Corning CellBIND surface treatment for enhanced cell attachment. It is 100% integrity tested. Sterilized by gamma irradiation and certified nonpyrogenic. Graduated. Sterile. Material: Polystyrene. Cell Growth Area: 225sq cm. Flask Shape: Rectangular. Neck Style: Canted. Surface Treatment: Corning CellBIND. Cap Style: Angled. Cap Material: High Density Polyethylene. Cap Color: Orange. Recommended Medium Volume: 45 to 67.5mL. Maximum Working Volume: 370mL. Corning #: 3293.