This set includes 20 traffic cones made from durable PVC for traffic control, parking, construction, and hazard marking applications. Each cone stands 18" tall and features a reflective collar for improved visibility during both day and night use. The large 11" x 11" square base helps increase stability and resistance to wind. These cones are designed for easy stacking and convenient storage and transport. They are built to withstand demanding outdoor conditions including heat, cold, rain, and sun exposure.