Mr. Chain Vaccination Label Stanchion Kits are an effective and cost-effective crowd control solution for both indoor and outdoor events. Each stanchion post stands 40 inches tall with a 14-inch hollow base that can be filled with sand for added stability. Two c-hooks on the top of each stanchion allow you easily attach the included plastic chain and run it in a continuous length. Great for organizing queues for vaccination, these stanchion posts are perfect for forming lines, directing crowds, or restricting access to protect people and property. The lightweight, high-density polyethylene design is made with UV inhibitors for long-lasting outdoor use.