Square/Ratchet Vertical Post for 2019 Trail Riders (Z Spec only) Includes plastic sleeve and top cap Length of post 30" For easy access to the rear cargo area on SUVs and mini-vans, the vertical post can be tilted down forward. Ratchet notches on both sides of the post To be used with the Trail Rider HR200Z model only *X and Y Spec Trail Riders need part number SPR-AP2 If you're not sure what spec you have, please send a photo of your rack to info@hollywoodracks.com