Ensure your semi is Ready for the Road Ahead™ with enhanced lubricant prevention and axle protection, with the National 370023A Red 37 Series Wheel Seal for 34,000 lb Drive Axles. To lock in lubricant and prevent contaminants from entering your wheel, this replacement wheel seal tightly fits inside the hub assembly. Fashioned with heat and weather-resistant rubber for optimal performance and durability in harsh climates. FleetPride is your First Click in Heavy Duty®.