General description The 18+18 Pack Cat Water Fountain Filters includes 18 activated carbon filters and 18 foam sponges designed for MUMU Cat Water Dispenser. These filters are essential for maintaining clean and fresh drinking water for your cat. Technical specifications Activated carbon cartridge dimensions: 7.6 cm x 4.3 cm Inner diameter of the sponge: 6 cm Compatibility and accessories Universal replacement filter for most stainless steel cat fountains Compatible with various models of 3.2L and 2L stainless steel cat fountains Installation Rinse the filter with water before use Usage Replace the activated carbon filter every four weeks Replace the sponge filter every two months Other information