Coloplast Assura® Skin Barrier, Extra Extended Wear, Convex Light, Cut-To-Fit Stoma Opening 5/8″-1-3/4″ (15 MM-43 is an ostomy skin barrier designed to help create a secure seal and support confident wear with two-piece, light convex barrier profile, extended wear wear formulation, and cut-to-fit opening. Box of 5.