Product Details Our Brass 1/2″ Electric Air Valve is a high-performance valve designed for multiple applications and a direct replacement for our Rocker Air Horns. Our Brass 1/2″ Electric Air Valve is built to last, constructed from solid brass and metal components. It features a 10mm orifice to give you optimal airflow. Great for your medium pneumatic needs such as suspension and air horns and comes with a mounting bracket pre-installed for ease of installation.