The Hitachi 4654315 Square Ring is a genuine OEM sealing component designed for critical hydraulic applications in various Hitachi excavators. This durable square ring ensures a tight seal, preventing fluid leaks and maintaining optimal system pressure. It is essential for the proper functioning of hydraulic cylinders, pumps, and other components in models such as the EX200-5, EX220-5, ZX200-3, and ZX210-3, providing reliable performance and extended service life.