Pouches are compatible with SUR-FIT Natura Two-Piece Ostomy System which is ConvaTec��s most extensive two-piece product line. The SUR-FIT Natura and Natura + Flange System signals a secure, accurate closure with a series of audible “clicks�. A simple snap-off, snap on design allows users to change the pouch quickly to match activities without removing the skin barrier from the skin.- Closed-End Pouch, 12", 1-Sided Comfort Panel, Tail Closure, Transparent, 1 3/4" Flange, 10/bx