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: 

Mercedes S-Class W221 S320 S350 S450 S500 S63 S65AMG (2007-2013)

Original spare part number:

A2213204913

A2213209313

A2213207313

A2213209713

2213204913

2213209313

2213207313

2213209713 

Our advantage:
-OEM quality
-Factory price

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