High-quality & Sturdy Materials: adjustable traffic delineator post from top-quality PP (Polypropylene) material, these are built to withstand harsh sunlight without fading and maintain their vibrant color whether it's scorching hot summers or freezing cold winters. They reduce the need for frequent replacements and safeguard traffic safety for the long haul! Stable Fillable Base: The base of delineator post is fillable base design. It can be filled with water or sand to increase weight and keep it more stable. The delinearcator base can weigh up to 8.8 pounds when filled with water and up to 12 pounds when filled with sand. Easy to Install: adjustable traffic delineator post and base have a simple connecting buckle construction, it can be assembled without tools and disassembled very easily. Save storage space and convenient to carry and transport