Features: Engineered for optimal heat exchange efficiency, this 626 721 BL3Z 18472 B heater hose ensures precise coolant flows dynamics in vehicles, delivering rapid cold weather performances while maintaining engine thermal balance. Crafted with high temperature plastic, the hose withstands 125°C operating conditions and features a leak proof design with <0.5% failure rate, offering 100,000 km durability for reduced maintenance in cooling systems components. Ideal for owners, driver, and enthusiasts in cold climate areas seeking heating systems upgrades without professional installation tools. Maintains consistent cabin warmth during winter commutes or long distance road trips by stabilizing coolant circulation in extreme temperatures, preventing engine overheating risks. Outperforms standard rubber hoses with its reinforced structure and precisions engineered connectors, ensuring leak resistant operate for cooling systems year round. Specifications: Component: Rubber Part Number: 626-721 BL3Z-18472-B Package Includes: 1pc HVAC Heater Hose note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.