Product Basics 1. Product Name: Black replacement water filter 2. Compatibility: Compatible with most gravity - fed countertop water purification systems, including Travel, Big, Royal, etc. series and Doulton Ceramic. 3. Color: Black 4. Material: Metal 5. Package Contents: 2 water filters Filtration Features 1. Filter Material: Uses high - quality NSF42 coconut shell activated carbon to effectively filter out odor, color, chlorine, and other contaminants. 2. Filtration Performance: Ensures clean, great - tasting water for worry - free consumption by users and their families. Usage Instructions 1. Replacement Interval: Replace the countertop gravity purification elements every 6000 gallons, subject to home water conditions. 2. Pre - installation Step: Rinse the inside of the filter with tap water until it runs clear for optimal performance. Cost - effectiveness Offers the same filtration level and performance as brand - name filters, providing high - quality water filtration benefits at reasonable and cost - effective prices. Notes 1. Color Variation: Lighting reflections and different screens may cause the color in the image to vary slightly from the actual product. 2. Measurement Error: A measurement error of +/- 1 - 3 cm is acceptable.