This Unit Has the Longest Rotor Shaft of Any Motorola Used on VW. There is a Distance of 2 Inches From the Top of the Fan to the Center of the Pulley. The Next Size Shorter Would Be the 13105. The Same Unit in Bosch, Spaced Out Properly Using the Correct Fan and Pulley, Would Be the 13147. There are Two Styles Here, the First With No Stator Stack Showing (210-218), and the Second (Later Style) With the Stator Stack Showing (210-218A).