Rocker Arm Shaft Shafts are important components of rocker arms, which open and close valves to allow fuel and air in and exhaust out of the combustion chamber Attributes: Cat parts are manufactured to precise specifications and are built for durability, reliability, productivity, less environmental impact, and reuse SPECIFICATIONS Height (in): 2.1 Length (in): 18.6 COMPATIBLE MODELS Engine - Generator Set D398B D399 D379B Engine - Industrial D379 G398 D398 D379B G379 D398B G399 G379A D399 Marine Products D399 D398B D379A D379B D398A