Heavy Duty Piston Rings 0.50 for 178F Engine Power Weeder are precision-engineered components designed to provide a tight seal between the piston and cylinder wall in diesel engines. The 0.50 size indicates an over-sized specification for engines requiring slightly larger rings due to cylinder wear or reboring. Each set ensures effective combustion chamber sealing, oil regulation, and reliable performance for use in 178F engine power weeders.