Size and color: 40mm lid Wall thickness: 1.5 - 2.5mm Color: Black RAL 9005, 4cm Package quantity: 4. Other sizes are shown in the table. Material and quality: All our lids are made of high-quality polyethylene, a durable material that resists twisting, UV rays and weathering. Perfect design: The top of the lid is carefully designed with rounded corners. The matte finish is scratch-resistant. Safety: The drill bit protects the cut end of the square (or other) profile and forms a protective barrier to prevent damage. It makes it easier to move furniture and protects floors from scratches. Assembly and use: No glue is required, assembly is simple and reliable; just press or hammer three strips. Suitable for steel, aluminum and plastic profile structures, fences, machinery, equipment, furniture, playground equipment and other garden elements.