●Think Crucial Replacement Aquarium Filters come in a pack of 4 ●These filters can be adapted to fit Aqua-Tech EZ-Change #2 and Aqua Brand 10-20 Power Filters ●They use a dual-sided mesh to trap debris and particles, improving water clarity and quality ●These filters are made with high-quality materials to ensure durability and optimal performance ●Easy to install and replace, making maintenance of your aquarium filter quick and easy