Coloplast Skin Barrier Rings 1-1/8" Stoma Opening, Soft and Flexible, Ring-shaped Hydrocolloid Barrier -Box of 30 Each. Product is manufacturered and licensed by Coloplast . Product is categorized as a skin barrier rings and washers . HCPCS: A4404 . Coloplast Skin Barrier Rings 1-1/8" Stoma Opening, Soft and Flexible, Ring-shaped Hydrocolloid Barrier. These Skin Barrier Rings are soft, flexible, ring-shaped hydrocolloid barrier provides skin protection for stomas, fistulas and draining wounds. Protects the skin. Soft and flexible. Soft, flexible, ring-shaped hydrocolloid barrier provides skin protection for stomas, fistulas and draining wounds.