Permeable tissue culture inserts offer improved cell adhesion, low protein binding, and a variety of defined pore sizes. Use for co-cultivation, cell migration, microscopy, staining, and transport process applications. PET (polyethylene terephthalate) membranes are sealed to the polystyrene housing and will not curl after detachment. Each insert has self-positioning hangers that eliminate capillary effects and maximize pipettor access to the well by positioning the insert slightly off-center. Sterile and individually wrapped.