Genuine OEM Audi Clutch Hydraulic Tube, part number 4F1721465L. This tube transmits hydraulic pressure from the master cylinder to the slave cylinder, enabling proper clutch engagement and disengagement. It is a critical component in the manual transmission's hydraulic system. With a length of 0.77 meters, this tube ensures precise routing and pressure integrity, vital for consistent clutch pedal feel and long-term reliability.