Product Details: The Haldex 1/2" NPT Port Emergency Gladhand with Dust Cover is designed to provide superior protection for your air system. This gladhand is developed for tough off-road applications and features a 1/2" NPT port diameter. The dust cover helps to prevent big particles like dirt, detritus, insects and other debris out of the air system. The dust cover is also color coded for easy identification. This gladhand is designed to fit most standard gladhands and is perfect for protecting your air system from dirt and debris. FleetPride is your First Click in Heavy Duty®.