Semi-Flexible Mounting Rings Firmer mounting ring designed for added support in the stomal area • Constructed with a stainless steel core covered with soft neoprene rubber • Flexible outer edges for comfort Basic Regular Convex • Ideal for slight or medium build persons, especially in the immediate post-operative period. Very slight convexity — 7/32" (5mm). 3-5/8" (9.2cm) diameter Part No. SF-10