70mm Piston Rings Kit For GX220 170F about 7HP Engine Motor Generator Water Pump This piston rings kit is designed for use with 70mm bore engines, compatible with GX220 and 170F models producing approximately 7 horsepower.It is suitable for applications in engine motor generators and water pumps.The set includes piston rings that help maintain proper compression and oil control within the engine cylinder.Installation requires standard mechanical tools and knowledge of small engine maintenance.correct fitment by verifying engine model and cylinder bore size before installation.