Our water fountain filters adopts high-grade PP cotton mesh to filter out pet’s hairs and food debris and premium cocoanut shell active carbon to remove odors and impurities effectively. In general, replace the filter every 2 to 4 weeks is recommended and it economically comes with 4pcs for you to keep the water always refresh. It fits for 1.6L/2.4L automatic pet water fountain (Model GPCT1677/GPCT1893) which you can find in our store. *GREAT FILTERING QUALITY: Adopting high-grade PP cotton mesh to filter out pet’s hairs and food debris and premium cocoanut shell active carbon to remove chlorine, odors and impurities effectively. *FILTER REPLACEMENT FREQUENCY: Replace the filter every 2 to 4 weeks is recommended and it economically comes with 4pcs for you to keep the water always refresh. *COMPATIBLE WATER FOUNTAIN TYPE: Fit for 1.6L automatic pet water fountain (Model GPCT1677) and 2.4L automatic pet water fountain (Model GPCT1893) sold in our online store. *EASY TO USE: Just take out the original filter of the water fountain and place the new filter into the same place. A simple operation to ensure a healthy drinking of your pets! *WARM PROMPT: It is normal that existing active carbon dust in the filter and to help remove it, please rinse the filter with water thoroughly before use. Brand: Fresh Fab Finds Product Type: Water Fountain Replacement Filter Material: PP Cotton Active Carbon Quantity: 4Pcs/Set Item Size (One Pcs): 12.8cm x 12.8cm x 0.8cm/5.04in x 5.04in x 0.31in (L x W x H) Item Weight (One Pcs): 18g/0.04lbs Package Size: 14x13.5x4.5cm/5.51x5.31x1.77in Package Weight: 81g/0.17lbs 4 x Water Fountain Replacement Filters