Keep your Aqueon QuietFlow filter running smoothly with these Samantha replacement filter cartridges. The pack includes 12 cartridges, each with a size of 10/20 tank capacity. These cartridges are made of high-quality carbon fiber material and are suitable for all water types. They are designed for internal filter location and have a duration of 4 weeks. The manufacturer, Samanija, has NSF external testing certification, ensuring that you get a reliable and efficient filter cartridge. These cartridges are perfect for pet owners who want to maintain a healthy and happy aquatic pet. Open Box - Products in Excellent condition looks brand new with little or no physical flaws, scratches or scuffs. - Item has been handled for inspection - Please anticipate signs of handling (fingerprints, lint, etc.) - Please view ALL pictures. Items packaging may have cosmetic damage - does not affect the item. Includes all items seen in pictures ONLY. - Actual item pictured. ITEMS USED OR SEALS BROKEN ARE NOT ELIGIBLE FOR RETURN OR REFUND (read return policy) Attention VeRO members: We're not affiliated with or endorsed by the companies mentioned in this listing, All trademarks and copyrights are acknowiedged, they are only used for informative description of the items offered for sale, All items are authentic as evidenced in photos, legally acquired and owned, and hence covered under First Sale Doctrine, Unlawful VeRO removal of this listing will constitute perjury and result in legal action