Genuine OEM Mazda Drive Shaft Inner Joint Boot Kit, part number FTB422540. This kit includes the boot and necessary clamps to protect the inner CV joint of the drive shaft. Its function is to prevent dirt, water, and debris from entering the joint while retaining the lubricating grease, ensuring smooth operation and longevity of the drivetrain. Genuine OEM boots are made from durable materials to withstand road conditions and temperature fluctuations.