SUR-FIT Natura® Two-Piece Stomahesive® Skin Barrier. These barriers feature a plastic coupling ring to allow the pouch and skin barrier to snap together for audible security. Ideal for stomas where the output is semi-formed to formed. The barrier adheres to both dry and moist skin, yet is gentle on the skin with a firm hold. Cut-to-Fit with Stomahesive® Flexible Skin Barrier and no tape collar. Size: 4" (100 mm) flange, Overall Dimensions: 6" x 6". 5/box.