Equip your semi to be Ready for the Road Ahead™, with the National 370031A Red 37 Series Wheel Seal for 44,000 lb Mack Drive Axles, a crucial component for enhanced axle protection and lubricant leakage prevention. Due to its ability to tightly fit inside the hub assembly, this replacement wheel seal effectively prevents contaminants from entering the wheel, while locking in lubricant. Molded with weather and heat-resistant rubber for optimal durability and performance in challenging climates. FleetPride is your First Click in Heavy Duty®.