Hardie Vent Mounting Block · Smooth Primed · 7¼"x9¼" w/4¼" ID · Area of free venting 36in²

• All blocks are created using the same James Hardie products you are installing to ensure a perfect color and product match.
• Vent block comes with a 4” inside diameter to accomodate most standard 4” vent pipes
• Can be used to accommodate for light fixtures requiring a larger inside dimension.