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·E39 [1995-2004] Estate

BMW·5 Series·E39 [1995-2004] Saloon

Original spare part number:

37121094613 / 37 12 1 094 613

37121095081 / 37 12 1 095 081

ASK-BW004L-AP

Our advantage:
-OEM quality
-Factory price

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