Features: High quality, made of highly compressed ceramic with diatomic properties; resistant to extremely high temperatures. The ceramic filter helps keep dirt, sand, and other particles out of drinking water. Removes impurities and volatile organic chemicals such as herbicides. How to use: 1. Soak the ceramic filter in clean water for 15 minutes. 2. Attach the rubber ring and assemble with the upper tank. 3. Rinse thoroughly with running water; do not use detergent. 4. Secure the nut and place onto the lower tank. Product Information: Name: Ceramic Dome Water Filter Specifications: Material: Ceramic + Plastic Color: White Package Contents: 1 x Water Filter Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement may vary by +/- 1-3 cm.