Cat® Pistons are connected to separate the pressure zones inside the barrel. The piston is machined with grooves to fit elastomeric or metal seals and bearing elements. These seals can be single-acting or double-acting. Cat® parts are manufactured to precise specifications and are built for durability, reliability, productivity and less environmental impact. Cat® Piston are held to the highest standards of quality and reliability. These piston are manufactured to exact tolerances to ensure leak free connections. Each Cat® Piston is designed to meet or exceed industry standards for operating pressure, assembly torque capability and corrosion protection to ensure a long life and proper machine functionality.Application:Cat® Pistons are used in the boom hydraulic cylinders of Cat® hydraulic systems of Cat® Machine. Consult your owner's manual or contact your local Cat® Dealer for more information.