The Bulldog Dugite Permanent In-Ground Bollards (165mm x 1800mm – yellow MRD) help prevent impact to buildings and assets from accidental damage or Ram Raids. This bollard is Hot dipped galvanised for rust prevention and powder coated safety yellow. They are stickered to Mains Road Department standard. Designed to be strong and durable. These bollards are normally embedded up to 600mm below the ground and can be concrete filled for maximum protection.