This pack of 10 replacement filter sponges is perfect for keeping your aquarium or pond clean and healthy. Designed to fit every size tank, these black sponges have an inner hole diameter of 2cm/0.8" and are made from high-quality sponge material. With a weight of 120g, these filters come with a package of 10 sponges and are branded by Uxcell. The package content includes 10 filter sponges that are easy to install and replace. These filters are a must-have for any pet owner who wants to ensure their fish and aquarium are in good health.