The N-3 Stoma Cover is a large rectangular patch with waterproof tan tape against the skin and a top layer of waterproof tan tape. One of our most absorbent patches, the N-3 can absorb up to 24 mL of mucous discharge. The standard hole for this patch is a rectangular center hole.Large Stoma Covers Style N-3 AMPatch Stoma Covers - 50 per Box