Our Inground bollards are designed for traffic control situations and asset protection. Our Economy Bollards comes with a removable plastic top which gives you the option to fill the bollard with concrete and just put the cap back off and your good to go. Don’t Forget – Free Shipping! Website: https://www.esafetysupplies.com.au/safety-product/bollards-and-barriers/bollards-in-ground/in-ground-bollard-90mm-2/