Standard culture membrane inserts are placed directly into the wells of a Multidish, and the feet at the bottom of the insert maintain a distance of about 1 mm between the membrane and the Multidish culture surface. The carrier plate culture membrane product adds a tray between the Multidish and the lid, with a set of hanger brackets at each well. These brackets engage one of three sets of tabs on each insert, to allow for selection between 3 different distances (approximately 1, 3, or 6 mm) between the membrane and the Multidish culture surface. This can allow for more flexibility in experiments, such as distance-dependent interaction between populations or media volume under cultures at the air-media interface.