Customizing headlights can be a thrilling project, but moisture issues can dampen the excitement. Enter the bolt-on breather vents, your ultimate solution against moisture. Designed to release trapped moisture while preventing any from entering, these vents are a game-changer. Installation is a breeze: drill a 12mm hole, insert, and secure. Unlike traditional stick-on membranes that can fall off, these bolt-on vents stay put, ensuring no unexpected gaps. They set a new professional standard in headlight moisture management. Given their effectiveness and the peace of mind they offer, they're a priceless addition to any headlight project.