Napoleon Adjustable Firestop, 4/7" | W010-3440

The Napoleon Adjustable Firestop, W010-3440, is a must-have for any fireplace installation. This firestop is specifically designed to fit 4/7 inch venting, ensuring safe ventilation and preventing harmful gases from entering the room. With its adjustable feature, it allows for flexibility in installation, making it easier for any professional or DIY enthusiast. Trust the Napoleon brand for top-quality and reliable fireplace accessories.