About this product: High QualityThis floating feeder ring made of high quality plastic material, non-toxic, strong durable. Keep the aquarium cleanThe fish feeding rings keep the food in a given area, it doesn't end up scattering in the filter. This wks wonders f reducing waste maintaining water quality. Use easilyPut the food in the circle, it will prevent the food from floating. It helps to get the fish into the habit of eating food in a fixed position. Tourist ValueIt has tourist value especially when the fish grab the food scene appear. Range of ApplicationThis floating feeding ring is suitable f feeding flake food other floating food. No use f sinking food. Product Description: Specification: Condition: br new. Material: plastic. Col: as pictures shown. Round inner diameter: approx.5.5cm. Square inner diameter: approx. 8 cm. Package list: 2 Fish Feeding Ring.