This is a repair kits(dust cover) for Mercedes W220 rear air strut.
The rubber is made by the Chinese No.1 truck air spring manfuacture, quality is very good.
Can be installed in the following for vehicles:
For Mercedes W220 S-Class 2003-2006.
this repair kits used for the following strut with the part number:
A 220 320 50 13; 2203205013
A 220 320 23 38; 2203202338