Increase safety and visibility on the road with this 5-inch black steel center-mount convex mirror, designed to give you a wide-angle view of blind spots and passing lanes. The 5-inch curved glass mounts using a 5/16-inch center-mount ball stud for strong rigidity and simple, precise adjustment. Available with or without a J mounting bracket. Built from high-strength carbon steel with a tough black powder coat finish, this mirror is made to last through harsh weather, long hauls, and rough road conditions. It's been vibration-tested and salt-spray-tested for at least 360 hours, ensuring durability mile after mile. Whether you're upgrading your existing setup or replacing an existing damaged convex mirror, this mirror is a dependable and an easy-to-install option for heavy and light duty trucks.