The SenSura Mio Convex Click Two-Piece Ostomy Skin Barrier is a two-piece mechanical coupling system that combines the unique double-layer adhesive with an audible "click" to ensure secure locking of the pouch to the barrier. The SenSura convex light barriers' oval shape is designed to help a stoma that is difficult to manage, such as a stoma that is flushed, retracted, or located in a skin fold. iproduct applies light and directed pressure on the peristomal skin to reduce the risk of leakage by allowing the stoma to protrude. Box of 5. Opening Size: 13/16 Inch Stoma