If your old vents need replacing, this reliable and affordable soffit vent is just the thing for the job. The round vent is great for keeping out large insects or small birds. You can also use it to eliminate troublesome damp as it improves airflow indoors. It fits into holes that are 70 mm in diameter.
Soffit vents are easy to install, and all you need to do is push it into place to give your roof or eave its required ventilation. The vent is made of durable plastic, so it has good resistance to ultraviolet light and won't degrade outdoors.