Customizable Height：The base dia: 13cm(5"), The pole dia: 7.6cm(3"); If the required size is not found in the list, you can contact us , we can make any size for you. Easy to Assemble：The bollard with 4 anchor bolts is easy to install on the base plate, with 4 pre-drilled mounting holes, assembly can save your effort and time Humanized design:The parking barrier has an exquisite round loop that can be used with a chain to form a guardrail, which is easy to use, beautiful, and does not hurt your hands. High Visibility: Safety bollard are made of premium stainless steel construction for all weather conditions. Reflective collars for 360 degree visibility. Protect Your Equipment：Use Street Sign Poles Outdoor Parking Bollard Post to protect public spaces, utility and electrical machinery, building entrances, and people from damage caused by vehicle collisions or transport vehicle issues.