Transparent - 2 3/4" Flange Box of 10 - Filter - ConvaTec SUR-FIT Natura - 12" Drainable 2-Piece Ostomy Pouch (InvisiClose Tail) evenly distributes the contents away from the stoma while being both quiet and odor proof. The optional charcoal filter helps deodorize and release gases while the InvisiClose tail offers security, convenience, and easy draining. All pouches feature a one sided comfort panel except for the Opaque pouches with filters. They come with two comfort side panels. In addition, the only pouch that comes with a flange size of 1 1/2" is the opaque filtered pouch. For the quality and durability relied on by many hospitals, look no further than this Drainable 2-Piece Pouch from ConvaTec. ConvaTec SUR-FIT Natura - 12" Drainable 2-Piece Ostomy Pouch (InvisiClose Tail) Features: * Available with or without filter * Audible click secures skin barrier to pouch * Works with ConvaTec Moldable skin barriers * InvisiClose tail closure provides convenience and security