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: 

Audi A6 C5  1999-2006

Audi Allroad Quattro Wagon (C5) 2001-2005

All Audi Allroad A6 C5 Type 4Z Quattro Models 1999 to the end of 2005

Audi A6 C5 Type 4B Models 1999 to the end of 2005

(2.5L V6 TDI/2.7L V6 BiTurbo/4.2L V8 Transmission 6-speed manual/5-speed automatic)

Original spare part number:

 4Z7616051A / 4Z7 616 051A / 4Z7 616 051 A 

Our advantage:
-OEM quality
-Factory price

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