Description: The filter is made of activated carbon, which can help remove chlorine, odor and organic pollutants in the water. The pet filters help to remove impurities in water , which helps remove chlorine, odors and organic contaminants from the water and keep the water fresh. The improved water quality can be removed by the kinds of Triple Filtration system. Capture all kinds of hair and debris, keeps water clean and fresh, remove bad tastes and odors. According to the number of pets using the drinking water , change the filter every 1-2 weeks in summer and 2 to 4 weeks in winter. To provide healthy water and improve the water quality for your pet cats and dogs. To prevent the activated carbon dust from shedding into cat water , please soak the replacement filter in water for 2 minutes and rinse it thoroughly under running water before use. Specification: Material: Activated Carbon Packing Size: 10x6.3x14cm/3.94x2.48x5.51inch Package Includes: 8 Pieces Filters Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!