Designed for Filters: This 10-pack of -Size cartridges is precisely engineered to fit for Emperor Filter 450 and the for Emperor Power Filters 280/400. Each ensures a for hassle-free installation and optimal filtration performance. Advanced Aquarium Filtration: Featuring a dual-layer filter pad and a blend of activated carbon and zeolite, these cartridges provide superior mechanical and chemical filtration. The evenly distributed adsorption granules maximize water contact, ensuring your aquarium remains crystal clear. Efficient Multi-Stage Filtration: Our cartridges work to remove visible debris and absorb dissolved impurities, chlorine, heavy metals, and odors, effectively purifying your aquarium water. This multi-stage process helps maintain a healthy and vibrant aquatic environment. Easy Installation Process: To install, simply rinse the under clean water to remove carbon dust, then slide it into your for filter.Compatible with both the for Emperor Filter 450 and the for Emperor Power Filters 280/400, it integrates seamlessly for immediate filtration. Maintain Optimal Water Quality: Essential for clear aquarium water, our filter cartridges sustain performance for up to four weeks. Regular monitoring and timely replacement based on your specific water conditions are recommended to achieve the best results. Color: Blue Material: Filter Sponge Package Contents: 10 x Aquarium Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.