Features: Prevent fishes food from scattering, maintain clean water quality, suitable for various shape of aquariums. Consist of durability silicones, easyly to install and clean. Circulars and square meet different needs. Suitable for various aquariums enthusiasts, especially those who want to simply the feeding process. Suitable for various environment such as home aquariums, office ornamental fishes tanks. Specifications: Color:Two Elections Dimension:5.8cm/2.28in 8cm/3.14in Component:Silicones Package Includes: 2pcs Aquariums Feeding Rings note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.