Features: 1. 3 Layer Filtration: The first layer is food-grade filtration cotton, which is a primary filtration of hair impurities. The second layer is a high iodine value coconut activated carbon, which can effectively remove the odor chlorine in the water and keep the water clean and bright. The third layer, food grade filter cotton filter again, water safety 2. Improve Water Quality: Replendish replacement filters with external polyester material captures sediment and debris, provide clean, fresh water for your cats and dogs, ensure the overall health of your pets. 3. Activated Charcoal: Finer charcoal granules increase the surface area exposure to water and maximize the effective filtration. Making the most effective to remove bad tastes and odors from water and encourage your pet to drink more water, which is good for their overall health. 4. Replacement Parts: Replendish replacement filters should be changed approximately every 4 to 8 weeks to maintain water freshness. (depending on the size and number of pet using the fountain). 5. Health Care: The pet water dispenser filter helps to make your dog, cat, or small pets healthier by keeping your pet's drinking water the cleanest it can possibly be. Healthy pets in happy family. Specification Material: Activated carbon, plastic Color: White Size(L x W): About 9 x 5cm/3.54 x 1.97inch Quantity: 3pcs/6pcs Package included: 3pcs x Pet Water Dispenser Filter Or 6pcs xPet Water Dispenser Filter Note: Due to the light and screen difference, the item's color may be slightly different from the pictures. Please allow 0.5-2cm differences due to manual measurement.