These heavy-duty all-weather cones are constructed of 100 percent PVC. Cones stack for easy storage. Cones with Reflective Collars offer added visibility in low light or nighttime applications. Cones with Recessed Reflective Collars reduce the chances of abrasions peeling and ripping of the reflective tape. 36"" cones have one 4"" and one 6"" band. Meets federal MUTCD standards.