Automatic bollards are for entrances that perhaps are mainly for pedestrians, but still require the occasional vehicular traffic movement. They can also be install behind gated systems for additional security.
These bollards are hydraulic and meant for intensive use and can be programmed to automatically lower in the event of a power failure.
The 275mm diameter shafts, are availible 600mm or 800mm tall. Stainless steel option availible. The shafts have built in LED lighting, that flash when the bollard is in motion.