Specifications: Material: PVC rubber Color: blue Product Size: Square Feeding Ring: 10 x 10 cm/4 x 4 inch Round Feeding Ring: 2.9 x 2.9 inch/7.5 x 7.5 cm Package Size: 5.9 x 5.5 x 0.4 inch/15 x 14 x 1.2 inch Packing list: 2 fish feeding ring Restrains Fish from Being Bullies A great way to restrict fish in a community tank from being bullies is to use multiple floating feeding rings. Fill one square fish feeder and allow your more aggressive fish to dash over to eat. Once they are occupied, add floating fish food to a second feeding square for the more timid fish. Bullies cant hog all the rings, so add as many as you feel necessary so all your fish can eat in peace. Keep Aquarium CleanThe fish feeding rings keep the food in a certain area, it inhibits the food from floating into unwanted places such as the filter, which allows more of it to be eaten. It is easier to clean up the residual feed, reduce waste, and maintain water quality, increasing more feeding fun. High-Quality MaterialsThe floating feeding ring is made of high-quality rubber and plastic, environmental and safe for your fish, regarded as an ideal aquarium food feeder for fish.