These seals go between the axle tube and the trailing arm on all Baywindow VW's. Its job is to stop dirt and water entering the axle which would in time damage the neeple bearings and arms causing wear. Sold as a set of 4 for one axle Other front axle components such as King Pin Seals, trailing arm grub screws and nuts, and steering idler pin etc are also available from the Wolfsburg Restos ebay shop.