Multidiameter is an adaptable through-a-wall cable sealing device based on modules with removable layers (diameter adjustments) that make installations easy and safe. To size it for a cable, the installer peels off layers for a perfect fit for cables or pipes. It allows sealing traditional cables and optic fiber cables or pipes side-by-side. A small, but proper distance between each cable creates area efficiency, and facilitates overview and maintenance. Built-in capacity makes it possible to add cables later.