Hollister New Image Convex Flextend Skin Barrier, Pre-Cut Stoma Opening 3/4″ (19 MM) Flange 1-3/4″ (44 MM) Tape Border is an ostomy skin barrier designed to help create a secure seal and support confident wear with two-piece, convex barrier profile, flextend wear formulation, and pre-cut opening. Box of 5.