Here is used a very durable material. 

Made in China quality CR Rubber, Bone material iis Nylon PA66
The long experience in the field of Air suspension, led to the highest quality. 
Thousands of satisfied customers confirm the superior quality of this product.

New O-rings and air connection are included. 

Can be installed in the following vehicles: 

BMW 5-Series E60/E61(2004-2010)

5-Series Touring Wagon (E60/E61) Models Include:

  520d, 520i, 523i, 525d, 525i, 525xd, 525xi,

  530d, 530i, 530xd, 530xi, 535d, 545i, 550i, M5

Original spare part number:

 37 12 6 765 602

 37 12 6 765 603

 37126765602

 37126765603

Our advantage:
-OEM quality
-Factory price

-Personal advice
-We have a 1 years warranty without mileage limits
-Worldwide express delivery is our standard