The Hitachi 4370063 Seal Ring 170 is an authentic OEM component designed for critical sealing applications in Hitachi heavy equipment. This precision-engineered seal ring ensures reliable operation and prevents leaks in hydraulic or other systems. Manufactured to Hitachi's stringent quality standards, it provides a perfect fit and long-lasting durability for compatible Hitachi EX series excavator models, including EX1200-6, EX1200-7, EX1900-6, EX2600-7, EX3600-6, EX5600-6, EX8000-6, and EX8000-7.