The Case IH D54830 is a genuine OEM disc blade designed for various Case IH tillage equipment models including the 4700, 475, 4800, 485, 490, 4900, 496, 770, 780, and 790 series. This smooth-edge disc features a 558.8 mm (22-inch) diameter and a thickness of 6.35 mm (0.25 inches). It has a 6-hole bolt pattern with a 133.35 mm bolt circle and 63.5 mm hole diameter, ensuring precise fitment and optimal performance in demanding agricultural applications.