Traffic Line Memory Post 460mm with Reflective Sleeve. The flexible properties of the traffic line memory post, even at sub zero temperatures, enable the cylinder to right itself even when hit or run over several times. Can be used to guide traffic or to give advance warning of a hazard Flexible post that returns to an upright position even when hit or run over several times Manufactured in anti-aging polyethylene (PE) Fitted with retro-reflective sleeves that conform to BS873 part 8 Gives high visibility by day & night & all Can be fitted directly into Cat's eyes or they can use optional base