Statement: The patented SlowStop® Bollard system is a revolutionary new rebounding steel pipe bollard that does more than just block access. During a collision, the kinetic energy of the impact is progressively absorbed by an elastomer hidden in the base of the bollard. The post is able to tilt approximately 20° as it progressively absorbs energy, softening the impact. After the impact, the post returns upright, leaving your guard intact and ready to perform again. SlowStop® Bollards are made for concrete installation only.