Get your semi Ready for the Road Ahead™ with improved brake performance, with the Meritor 9-13/16" Twin Piston Caliper Type Air Disc Brake Pad Kit. This replacement kit works to restore the air brakes to their original working condition, by replacing the calipers and pistons that clamp down on a wheel once the brake pedal is engaged. Designed with durable and long-lasting parts for refuse truck applications.