CELLTREAT® 0.4 µm Polyethylene Membrane Inserts support the growth of both anchorage-dependent and anchorage-independent cells, including those that are fed at the basolateral surface or in co-culture systems. These permeable inserts have a pore density of 2 x 10^6 pores/cm² and are recommended for culturing airway epithelial cells at the air-liquid interface; they can be used in studies related to infectious and genetic disease modeling, drug discovery, toxicity testing, and epithelial cell bio