Part number 0750-619594 is an Aero (OEM) Easy Cover Sprocket 40B30 with a 1" Bore and Stainless Steel Key - Clear Zinc. This sprocket is a vital component in Aero Industries Easy Cover tarp systems, particularly those with chain-driven mechanisms. It features a 40B30 designation, referring to its size and type, and a 1-inch bore to fit a corresponding shaft. The stainless steel key ensures secure attachment and power transfer. Its clear zinc coating provides corrosion resistance, helping to extend the life of the part within the demanding environment of a dump truck or trailer.