The Honda 13102-ZF6-W00 Lawn Mower Piston - 0.25mm helps restore engine performance in compatible Honda small-engine applications requiring an oversize piston. The piston moves inside the engine cylinder as part of the combustion process, converting combustion pressure into mechanical motion to power the engine. This 0.25 mm oversize piston is intended for appropriate engine repairs w... https://www.wholetoolbox.com/honda-13102-zf6-w00-lawn-mower-piston-0-25mm/13102-ZF6-W00.html