Update your semi with enhanced axle protection and lubricant leakage prevention, with the National 376590A Red 37 Series Wheel Seal for 22,500 lb Trailer Axles that ensures you're Ready for the Road Ahead™. With a snug design that gently fits inside the hub assembly, this replacement wheel seal locks in lubricant while preventing contaminants from entering the wheel. Manufactured with weather and heat-resistant rubber for optimal durability and performance in harsh climates. FleetPride is your First Click in Heavy Duty®.