Description:Service component for drive coupling group.Attributes:• Material: Cast Iron• (166) tooth external spline provides exact OEM fit• Outside Diameter: 426.26 mm (16.7818 in)• Inside Diameter: 352 mm (13.858 in)• Thickness: 30.5 mm (1.2007 in)Application:Consult your owner’s manual or contact your local Cat Dealer for more information.