This is a Febi Bilstein Gas Spring, part number 31644, designed for the boot/cargo area. It is OE equivalent in quality and fit. The gas strut has a length of 439 mm, weighs 0.307 kg, with a housing diameter of 22 mm and a housing length of 248 mm. It provides an eject force of 550 N and a stroke of 157 mm. The mounting points have a diameter of 18 mm and the piston conrod diameter is 8 mm. This part is suitable for placement on both sides of the vehicle. It is important to always check that this product is correct for your vehicle before purchase. Installation should be carried out by a competent individual, and products are usually supplied without fitting instructions. Cross-references include 4U Autoparts 48364VV and 4X4 ESTAN FIEST-ZSA09220A.Z. .