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: 

2000-2006 BMW X5 (E53) With Sport Air Suspension

Original spare part number:

37126750355

37 12 6 750 355

37121095579

37 12 1 095 579

Our advantage:
-OEM quality
-Factory price

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