This is a one-piece ostomy system with a free-cut design, compatible with stoma diameters of 29-44mm. - Model Name: Cellcare 1-TDc - Product Type: One-piece ostomy system - Effective Stoma Diameter: 29-44mm - Model Number: 20141 - Free Cut Type: 45 Free - Expiration Date: 2030/05 This is a convex type designed for those with abdominal wrinkles or those whose stoma opening is not raised, making it prone to leakage or pouch detachment. Due to shipping costs, we will ship it without the box, so we can offer it at a lower price.