Prepare your semi to be Ready for the Road Ahead™, with the National 380025A Gold 38 Series Wheel Seal for 22,500 lb Trailer Axles that offers superior axle protection and lubricant leakage prevention. This replacement kit snugly fits inside the hub assembly, preventing contaminants from entering the wheel and preserving the lubricant. Engineered with weather and heat-resistant rubber for optimal performance and durability in harsh conditions. FleetPride is your First Click in Heavy Duty®.