These Longacre billet rear-end breathers provide a convenient way to vent rear differentials, transmissions, and other components. They're easy to use--just clamp them on to a roll bar and no welding is required. Tube clamp on design, no welding required. Includes vent, hardware, and hose for a quick professional installation. Differential Vent Thread Size (in): 0.125. Differential Vent Head Style: Round. Differential Vent Material: Steel/Rubber. Differential Vent Finish: Chrome. This bracket mounts to 1-3/4 in. round bar.