Falcon® 35mm TC-treated Easy-Grip Style Cell Culture Dish, Sterile, 20/Pack, 500/Case Actual Dimensions – 40.28mm O.D. x 6.17mm Flat, optically clear polystyrene surfaces for distortion-free microscopic visualization of cells Uniform surface chemistry created by vacuum-gas plasma treatment promotes cell attachment Improved handling of small dishes with the unique Easy-Grip design Nonpyrogenic Sterile Packaged in peel-open, medical-style bags Crystal-grade virgin polystyrene