Warning Columns Car Bollard with Yellow Reflective Film Warning Signs Visible in dim light or at night: Yellow reflective film warning signs on the column improve visibility and remind drivers to proceed cautiously after dark. Detachable base for easy passage: The column can be separated from the base with a key; lift the upper column to facilitate passage when a vehicle needs to go through. Broad range of applications: Suitable for commercial or private parking areas to prevent unauthorized stopping or blocking; also useful in residential communities, shopping malls, hotel and airport parking management, office complexes, and other facilities. Durable stainless steel construction: The surface is smooth and mirrorlike, providing corrosion resistance to wind, rain, and temperatures; resistant to rust and designed to withstand harsh weather while enhancing safety.