Winstar Steel Safety Bollards 2 Pack, 48" x 4.5" D, 5.5" DSafety bollards protect people and facilities from vehicle collisions by creating a physical barrier without impeding pedestrian flow. They can effectively prevent important objects from being damaged by impact, and can be used indoors and outdoors. Impact Resistant Design: The wall thickness of the safety bollard is designed to be 0. 12 inches, and the thickness of the surface coating reaches 80m. In addition, the bottom adopts a sealed design, which