Duraflex Self Righting Traffic Bollard | NAL CompatibleThe Duraflex NAL Bollard is the same as the standard Duraflex Bollard but features a spigot compatible with the sleek NAL retention socket. The beauty of the NAL retention socket is that once the socket has been installed the bollard can be inserted or removed quickly and easily. The side compartment of the NAL socket houses the locking system for the bollard. This is covered with a plate secured with a security Allen screw. Key Features Single or