Product Details: Update your semi with an equal distribution of tire pressure, with the Dual Dynamics 110 psi Cross Fire™ Dual Tire Pressure Equalization System that ensures you're Ready for the Road Ahead™. Due to its sophisticated design, this replacement valve is able to seamlessly mount between dual tires to allow for a free flow of air to maintain equal pressure levels. Constructed with premium-quality materials to withstand extreme pressures. FleetPride is your First Click in Heavy Duty®.