Replacement filter is suitable for Youthink 2.1L ceramic fountains, catches hair and dirt, removes impurities and odor. Double action filter: activated carbon filter in coconut shells and foam filter. Pack of 4 activated carbon filter and 1pcs foam filter, size: 6 x 4.5 x 2cm (L x W x H). Replace your filter every 2-4 weeks and discard the filter every 3-4 days to maintain water freshness. Note: Rinse the filter thoroughly before using with water. Foam filter can be cleaned with water, detergent is not allowed. Product Information Technical description Type of animal Dogs, Cats Product dimensions (L x W x H) 6 x 2 x 4.5 cm; 40 grams Colour Fr Keramiktrinkbrunnen Size 1.6 L / 56 Oz Product Weight 0.04 Kilograms Number of items 1 Requires batteries No Battery(ies) / Battery(ies) included No Product description Description: Suitable for: Ceramic Fountain Material: activated carbon and plastic Color: white Size: 6 x 4.5 x 2cm (L x W x H). Package: 4pcs activated carbon filter and 1pcs foam filter