Description:Cat brake pistons are a critical component in the brake system for Cat machine drive trains, allowing the machines to slow, stop, or hold a stationary position.Attributes:• Material: Cast Iron• (128) tooth external spline provides exact OEM fit• Outside Diameter: 409.36 mm (16.116 in)• Inside Diameter: 258.38 mm (10.172 in)• Width: 47 mm (1.850 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.