Finally, there is a bollard that does NOT have to be replaced after being hit? The SlowStop® Bollard is maintenance free and hassle free. The patented SlowStop® Bollard system is a revolutionary rebounding steel pipe bollard system 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.