This AH233138 corn head gathering chain assembly fits all John Deere 600 series (excluding 643 & 693) corn head gathers. What separates this chain assembly from others is that it uses an extreme-duty CA620 chain that is assembled using special high-strength heat-treated components and features a solid roller design for increased performance and durability. It has eight (8) C6E attachments/ gathering lugs that are spaced every 9.92" and it is 48 links long, which is 79.39" total. We can also supply sprockets, bearings, and other accessories that go to corn head gathers, combines, and other types of agricultural equipment.