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Convex-it Natura Durahesive Flexible White Skin Barrier 1-3/4" (45mm), Pre-cut | CV-413178
Precut Convex Barrier — 16 mm
The ConvaTec Natura® Durahesive® Convex-IT® skin barrier, manufacturer reference 413178, is an ultra-flat convex barrier with a pre-cut opening, designed for stomas needing gentle convex support. Its white acrylic tape collar provides added adhesion, and its Durahesive® technology ensures a secure seal suited to liquid output.
Key Features
- Pre-cut opening: 16mm (5/8")
- Built-in Convex-IT® convexity, ultra-flat
- Coupling: 45mm (1 3/4"), compatible with Natura® and Natura+® pouches
- White acrylic adhesive tape collar for added peripheral adhesion
- Durahesive® technology: swells slightly on contact with liquid output for a secure, leak-resistant seal
- Barrier size: 11.5cm x 11.5cm (approx. 4.5" x 4.5")
- Box of 10 units
Technical Specifications
| Manufacturer | ConvaTec |
| Brand | Natura® Durahesive® Convex-IT® |
| Manufacturer reference | 413178 |
| Stomo Médical SKU | CV-413178 |
| Type | Two-piece skin barrier, convex, pre-cut |
| Pre-cut opening | 16mm (5/8") |
| Coupling | 45mm (1 3/4") |
| Collar colour | White |
| Collar type | Acrylic adhesive tape |
| Barrier size | 11.5cm x 11.5cm (4.5" x 4.5") |
| Compatibility | Natura® and Natura+® pouches |
| Quantity | Box of 10 |
Other pre-cut openings available in the same Convex-IT® range (45mm coupling): 13mm (ref. 413177), 19mm (ref. 413179), 22mm (ref. 413180), 25mm (ref. 413181), 28mm (ref. 413182), 32mm (ref. 413183), and 35mm (ref. 413184).
Larger sizes with a 57mm coupling are also available: 38mm (ref. 413185), 41mm (ref. 413186), 45mm (ref. 413187), and 50mm (ref. 413188).
Indications for Use
This Convex-IT® pre-cut convex barrier is intended for ostomates whose stoma needs gentle convex support, for example a slightly retracted or flush stoma, with an opening precisely matching 16mm. Its ultra-flat design allows for better discretion under clothing while providing the convex support needed to maintain a good seal.
Frequently Asked Questions
Will this barrier work if my stoma isn't exactly 16mm?
This barrier is precisely pre-cut to 16mm and cannot be adjusted. If your stoma has a different diameter, other pre-cut sizes are available in the same range, from 13mm to 50mm.
What's the difference between this barrier and a cut-to-fit version?
A pre-cut barrier offers a fixed, precise opening, ideal when the stoma size is stable, while a cut-to-fit version allows the opening to be adjusted at home as needed.
Is this barrier compatible with all Natura® pouches?
Yes, as long as the pouch has a 45mm (1 3/4") coupling, compatible with the Natura® and Natura+® ranges.


