The product is a set of two rear left and right air suspension springs for Mercedes E-Class W212 S212 vehicles. These air springs are manufactured by the brand "airsusfat" and come with a 2-year warranty. They are classic parts with a surface finish and are interchangeable with various part numbers such as 2123203925, A2123203925, 2123200825, and more. The air springs are designed for the rear placement on the vehicle and are suitable for models with reference OE/OEM numbers matching the listed part numbers.