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 (16.1165 in)• Inside Diameter: 247.25 mm (9.734 in)• Thickness: 43.34 mm (1.706 in)Application:Brake pistons are used in Cat drive train braking systems. Consult your owner’s manual or contact your local Cat Dealer for more information.