Product Details: Prepare your semi to be Ready for the Road Ahead™, with the Euclid 20.38" / 28-Spline / Left Medium Full Camshaft Bushing Kit that offers reliable air brake performance. Due to its multitude of components that tighten and seal the internal brake drum, this repair kit allows the camshaft to spread the brake shoes apart and slow a vehicle. Constructed with precisely-engineered accessories to defend against wear and provide long-term dependability. FleetPride is your First Click in Heavy Duty®.