Plastic Bollards | Replacement SleeveReplacement sleeve for plastic bollard recycled with a Steel Core Our Plastic Bollards Recycled with a Steel Core is made entirely from hard wearing plastic, and incorporates the plastic offcuts and other waste generated during manufacture. We offer both a standard version which is suited to more moderate traffic areas, and an anti ram model which has a 90x3mm steel tube core potted to a depth of 800mm to increase its strength of resistance against