Dust seal that is mounted in the hub flange of the rear wheel.
For both 120 and 150mm hubs.
For both spoke wheels and cast (Aluminium) wheels.
For the models: 510, 515, 517, 529, 530 (KS50), 530 (KS80)
Included parts correspond to Zündapp original numbers:
433-15.117
433-15.119
433-15.121