Coloplast Sensura® Flex Skin Barrier, Non-Convex, Cut-To-Fit Stoma Opening 3/8″-3-1/2″ (10 MM-88 MM), Flange 3 is an ostomy skin barrier designed to help create a secure seal and support confident wear with two-piece, convex barrier profile, cut-to-fit opening, and compatible with SenSura. Box of 5.