Product information: Number of pieces: 6 pieces Size: 13.1 * 13.1 * 5.7cm Material: Coconut shell activated carbon with a high iodine value Color: Carbon Filters Replacement 1. FULLY COMPATIBLE --- This flower fountain filter is fully compatible with 2L Pet flower water fountain. 2.6 PACKS IN ONE SET --- You can get 6pcs pet fountain filters by buying this product worthy of such high quality. 3. DUAL ACTION FILTER --- Contaminants and odors catch hair and dirt make the water in the fountain fresher tastier. 4. EASY TO USE --- Rinse the filter with water before use and replace it every 2 to 4 weeks to keep the water fresh.