This is a replacement air cell for the Drive Medical 14025N pressure redistribution system. The air cells are the part of the pressure redistribution overlay that contain the air. There are 2 types of air cells for this overlay: with laser holes and without laser holes - both are necessary for this overlay to work properly. The air cells with laser holes make up the middle 9 cells of the overlay, and they let out the small amount of air necessary to alternate the overlay's pressure. The air cells without the laser holes make up the remaining 11 air cells of the overlay, and they do not release any air. Each cell has a 5" height
