This pistons and rings set is compatible with Transporter, Beetle (Car) (Car) (Car) (Car) (Car) (Car) (Car) (Car) (Car) (Car) (Car) (Car), and A3 vehicles equipped with 2.0 TDI CJAA engines.The set includes four pistons ( 03L198151C), four piston rings, and a piston ring kit ( 03L107065M/N).Piston diameter: 80.95 mm.Piston pin size: 26x1.5 mm.Piston ring sizes: 1.81x1.75 mm, 1.81x2 mm, and 1.81x3 mm.The components are engineered for proper fitment and consistent function under normal operating conditions.The piston rings help maintain cylinder sealing to support efficient combustion and reduce oil consumption.