Pet Filter Water Softening Filter, Genuine Activated Carbon + Ionic Exchange Resin, Replacement Filter for Smart Pet Water Fountain, Suitable for 2.4L Cat Automatic Water Dispenser, Maintains Urinary Tract Health, Safe and Clean, Square - Quantity: 8 filters - Filter Type: Pet Filter - Materials: Cotton, Activated Carbon, Ion Exchange Resin - Size: Approximately 12.5cm x 12.5cm Thank you for viewing. The filters will be shipped without the box. If you need the box, shipping will be an additional 300 yen, so please comment beforehand. If you do not need the box, you can purchase immediately.