The Spring Loaded Steel Bollard is designed to serve as a visual and audible warning to personnel. Unique spring-loaded design will bend and not break like rigid bollards. Prevents damage to bollard and equipment. Promotes long life. This bollard has a light/siren which includes sensitive switches that will activate a strobe light and warning siren when contacted. Operates with batteries (not included). Simply slides into open top of bollard. Each bollard is manufactured from steel and includes a powder coat safety yellow finish.