These ground barriers are generally applied, where high security and protection is needed. They can be remote controlled, watchman controlled, proximity card controlled or even locking conrolled upon request.
The sizes for automatic ground barriers are 20cm of diameter, 50 cm of height and 10 mm of matarial thickness. The sizes are a little bit different for manual ones, 22 cm of diameter, 35 cm of height and 5 mm of material thickness, ( these sizes for the piece seen above the ground )