Equip your semi to be Ready for the Road Ahead™, with the National 370150A Red 37 Series Wheel Seal, a crucial component for enhanced 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®.