Fitment: for Jeep Grand Cherokee 1999-2004. Please check the fitment carefully before ordering. OE Number: 8194753, 3521VC, 55137022AB, 55137023AA, 55137023AB. Length: Extended Length: 18.5'/ 47cm ; Compressed Length: 13.03' / 33.1cm; Thread Size: M8x1.25. Placement on Vehicle: Rear trunk, please make sure the installation place before purchasing. Easy Installation: We have Installation quick guide for you. Easy to install with simple hand tools in just minutes, no special tools required for installation.