Brand new, unused. Instant purchase welcome ⭕️ Ships on Monday. Will be shipped after removing from the box. Menetop Pet Automatic Water Dispenser Replacement Activated Carbon Filter, Circulating Water Dispenser Activated Carbon Filter, Water Bowl for Cats, Water Dispenser, Individually Wrapped, Safe, Water Softening, Antibacterial Activated Carbon, Ionic, Ion Exchange Resin, Leftover Food, Softening Filter Outer Material: Pure Cotton Non-woven Fabric; Liner Material: Activated Carbon, Resin Quantity: Individually Wrapped, 12 pieces Replacement Frequency: Replace every 2-4 weeks Dimensions: Outer Diameter: 12.5cm, Inner Diameter: 3.5cm, Thickness: 1cm (Suitable for most pet water dispensers) Applicable to PEDY, ISYOUNG, HOMMII, YOUTHINK brand 810Z/2.4L or 540Z/1.6L automatic water dispensers; not compatible with other brands with different sizes.