Costar Snapwell cell culture devices and Diffusion Chamber Systems permit convenient permeability measurements using cultured cells as models for drug absorption and transport studies. Snapwell devices are two-piece Transwells that allow convenient polarised cell culture on a permeable support. The Snapwell is a modified Transwell culture insert that contains a 12 mm diameter tissue-culture-treated membrane supported by a detachable ring. Once cells are grown to confluence, this ring is placed into either the Vertical or the Horizontal Diffusion Chamber. Snapwells are provided sterile and pre-loaded in 6 well cluster plates. Packaging: 4 plates, 24 inserts