Square/Ratchet Vertical Post for 2019 Sport 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 horizontally. Ratchet notches on both sides of the post To be used with the following models: HR1000Z HR1400Z HR1450Z HR1450Z-R HR1450Z-E HR1455Z-E HR1460Z-E HR1475Z HR1500 HR1560 *Y Spec Sport Rider (2016 - 2018) you will need part number SPR-AP4 *X Spec Sport Rider (2004 - 2016) you will 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