Features: Plastic materials, these floating rings preventing pollution while keep feeding area clean and organized. Provide a safe living environment for floating plant. Retain floating food and prevent food from entering filter. They can protect floating plant from being washed away by strong current, sucked into filter or eaten by fish, and better for the water environment. You can place fishfood in the floating rings to prevent food from floating around. Gift to your friend who is fish lover, fish tanks users in families or offices Specifications: Component: Plastic Type: Round/Square Quantity: 6Pcs Size of Round: Approx.2.17inch Size of Square: Approx.8cm/3.15inch Package Includes: 6pcs Aquariums Floating Plant Rings note: 1.Please allow 1-2cm errors due to manual measurement, note that you donot mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.