Product Details: The Meritor Drive Axle Breather and Tube are designed to provide proper ventilation and pressure equalization. This product is easy to install and is typically placed on the drive axle housing at a designated breather port. It helps to prevent the formation of a vacuum or excessive pressure within the axle assembly, which can cause damage to the axle components. With its durable construction, this product is designed to withstand the harsh conditions of the environment. FleetPride is your First Click in Heavy Duty®.