4PCS Activated Carbon Filter For Automatic Cat Dog Fountain Water Feeder Replacement Drinking Machine Filter Core Accessories Features: activated carbon filter for automatic circulation type water supply replacement * 4 pieces set. It is recommended that the filter exchange one piece a month, set for about eight months. Size: L = 12.5 cm exchange resin: Magnesium and calcium in water are removed, and it is made into cat-friendly water (soft water) whose hardness is lowered. High performance activated carbon: It absorbs odor and bacteria. When cleaning the filter, please do not use detergent, please rinse off the surface dirt with water. When replacing the filter, be sure to clean the parts of the water supply unit to ensure cleanliness. The direction of installation of activated carbon filter is one direction only. Filter Only,any other accessories are not included Note: 1. The charcoal filter should be changed every 2 to 4 weeks. 2. Fountain should be cleaned at least every 2 weeks. Specifications: Type: Charcoal Filter for Flower Waterfall Material: Activated carbon, cotton Quantity: 4pcs Item Color: White Compatible: Flower Waterfall Size: 12.5*0.5cm / 4.9*0.2"(D*H) Net Weight: 25g / 0.9oz Packing list 4*Charcoal filter 1*Package box