This Corning graduated rectangular cell culture flask with a canted neck is manufactured from optically clear virgin polystyrene. It has a vented orange high density polyethylene cap. Ultra Low Attachment surface features a covalently bound hydrogel layer that effectively inhibits cellular attachment and minimizes protein absorption, enzyme activation, and cellular activation. Surface is non-cytotoxic, biologically inert, and nondegradable. It has a 25 cm² available cell growth area, a recommended medium volume of 5 to 7.5mL, and a maximum working volume of 10mL.