This emergency relay valve is a must-have for any commercial truck owner. It is designed for use with air brakes and is compatible with the ARMADA brand. The valve is easy to install and use, ensuring that you can quickly get back on the road in case of an emergency. With its durable construction and reliable performance, this emergency relay valve is a crucial component for any truck's brake system. It is perfect for those long road trips where you need to be prepared for anything. So, whether you're a professional truck driver or just someone who loves to travel, this valve is sure to give you the peace of mind you need.