Plastic Road Marker: Made of modified reinforced engineering plastic and fiberglass. The special texture design of the bottom surface is secured with rivets, ensuring a firm connection to the ground. Durable construction offers resistance to high and low temperatures, water, oil, chemicals, salt, alkali corrosion, and weathering. Material: Aluminum. Aluminum Road Marker: The base is filled with fine sand for added weight and improved pressure resistance. Features two-tone white and yellow mesh reflectors that provide enhanced visibility at night and in poor weather conditions. Silver Road Marker: Reflective road markers are ideal for marking driveways, private roads, or parking lots. Equipped with handles on both sides of the housing for easy handling during installation, helping to keep the reflector surface clean.