TRAFFIC-LINE Flexible Post Off-Highway - 460mmH. EU-Flexible Posts are a lightweight cylinder used to guide traffic or provide warning of approaching hazards. Manufactured in HDPE material with Retro-reflective sleeves they are used on non-public roads, private property such as distribution depots, warehouses, car-parks etc. A special joint in the base ensures that they are self-righting after a collision. Can be fitted to 'cats eyes' or optional base.