1. Standard Size for Replacement: The piston rings have an outer diameter of 38 mm and a thickness of 1.2 mm. They are designed as a standard size for replacement parts, ensuring compatibility with various chainsaws. 2. Tensile Strength and Durability Made from strength materials, these piston rings offer wear resistance and yield strength. Built to last, they withstand prolonged use and deliver reliable performance. 3. Wide Application Compatible with various chainsaws, these piston rings serve as a reliable replacement for worn or broken rings. They are suitable for a range of chainsaw models. 4. Compatibility Assurance Before , it is recommended to compare the size of your piston ring with our product dimensions to ensure compatibility. This guarantees a proper fit for your chainsaw and avoids inconvenience.