Part number 0311-962810 refers to an Aero Economy Easy Cover Cab-Level Hand Crank Control Box. This part is specifically designed for Aero Industries Economy Easy Cover manual tarp systems. It provides a convenient way to operate the tarp from within the truck's cab. Essentially, it allows the driver to manually extend and retract the tarp using a hand crank mechanism. This control box is a key component for manual tarping operations on dump trucks and trailers.