This heavy-duty rubber hose is designed for alternator vacuum pump circulation in ISUZU NRR NPR NPR-HD NQR models with 4HE1 4.8L and 4HK1 5.2L engines (1998-2007). The robust construction ensures efficient flow while maintaining durability in demanding engine environments. This replacement vacuum pump alternator hose is manufactured to meet original equipment specifications for proper fitment and function. Perfect for maintenance and repair needs, this component comes as a single unit ready for installation. The hose's dimensions and specifications make it ideal for professional automotive repair applications where reliable coolant circulation is critical.