Natura® Convex Durahesive® Skin Barrier, White, Cut-To-Fit Stoma Opening 1/2″-1-7/8″ (13 MM-48 MM), Flange 2 is an ostomy skin barrier designed to help create a secure seal and support confident wear with two-piece, convex barrier profile, durahesive wear formulation, and cut-to-fit opening. Box of 10.