Under-Run Protection Bar For Hybrid Flexible Barrier SystemThe under run protection bar is an easy to install addition to the Black Bull Flex Hybrid Barrier system. While still allowing the plastic beams to absorb impacts, the bar ensures the vehicles do not breach through the perimeter. The bars are ideal in areas where increased protection is needed. This may be in high risk areas with space constraints, such as near busy walkways and delicate machinery. The additional under bar works in conjunction with