Customizable height: Base diameter is 13 cm: 13 cm (5 inches), pole diameter: 8.9 cm (3.5 inches); If the size you need is not in the list, you can contact us by email and we can make any size for you. Sturdy and durable: The stake is made of a combination of thickened stainless steel and a thorough welding process. It is durable and has maximum strength, durability, and resistance to oxidation, UV rays, and adverse weather conditions. Easy to assemble: The bollard with 4 anchor bolts is easy to install on the base plate, with 4 pre-drilled mounting holes, and assembly can save effort and time. High visibility: The surface of the parking column is designed with a high reflective film and is firmly adhered. It is not easy to fade or fall off after long-term exposure to the sun. It has a long-lasting reflective effect and improves driver visibility.