Air Brake Camshaft, Left Hand, 15" Or 16-1/2" Extended Service Shoe, Eaton Drive Or Steer Axles, 11-1/2"(11.50) Long (Under Head To End Snap Ring Groove), 10 Spline With 1.50" Spline Diameter, 1-1/2" Journal Diameter, 1-1/8" End Diameter, Enclosed Cam Tube Application