[Compatible] Filter compatible with Drinkwell animal drinker. Eliminates bad stains and odors [Economical] 12 pieces to replace the Drinkwell carbon filter element. [Hair and residual debris] Dual density polyester pad can retain hair and debris to keep the water fresh and clean. [Replacement] 2 to 4 weeks Although our fountain filter can be used for a long time, in order to ensure the best protection for our animals, we recommend to replace it every 2-4 weeks. Product Description Replacement filter for cat fountain. Keep the cat& 39;s drinking water cool, clean, and safe. Help you take care of your cat& 39;s health. Specification: Name: Cat Water Fountain Filter Inner Material: Activated Carbon Cotton Applicable to: Drinkwell Platinum Size: length 140 * width 80/85 * thickness 7 mm Pay attention: There might be some deviation due to slight color difference caused by manual measurement or shooting conditions. Thanks for your understanding. Packing list: 12 * Cat fountain filter Note: Due to manual measurement, please allow 0 to difference. 2 cm. Thanks for understanding. The monitor calibration method is different. The color of the product shown in the photo may be slightly different from the actual product. Please refer to our size before ordering. Delivery quantity: 12 pieces