Prepare your semi truck to be Ready for the Road Ahead™, with the Stemco 2-3/4" Axle Hub Cap Window Kit that allows operators to easily inspect a hub's internal components. Due to its transparent design, this replacement component allows for seamless visibility to check bearing conditions, lubricant levels, or oil quantities. Engineered with corrosion resistant and durable materials. FleetPride is your First Click in Heavy Duty®.