Durable Mesh Material: Crafted from woven mesh materials, these ring-shaped honeycomb filter socks boast a robust structure that endures the rigors of aquarium use, safeguarding equipment from sand and coral particles. Optimal Filtration Efficiency: Each 9.8-inch long by 4-inch diameter honeycomb filter bag features a 150-micron grade, ensuring compatibility with various filtration systems while maximizing filtration effectiveness for pristine water quality. Effective Debris Removal: Engineered with honeycomb design, these filtration socks excel at eliminating organic matter and debris from aquariums, fostering a cleaner and healthier aquatic habitat. Versatile Aquarium Essential: Ideal for both saltwater and freshwater tanks, these filter socks serve as indispensable accessories in aquarium maintenance kits, offering multifunctional utility for diverse aquatic environments. Beyond Aquariums: With their versatility, these filter socks not only for traditional use, doubling as decorative elements for aquariums, homes, and even swimming pools, adding aesthetic appeal to various settings. Item Name: Fish Tank Filter Bag Material: Cotton Features: 3D Honeycomb Design, Reusable, Efficient Filter Size Details: L: 25cm/9.84", W: 13.5cm/5.31" (Approx.) Opening Diameter: 4" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 6pcs: 6 x Fish Tank Filter Bag or 12pcs: 12 x Fish Tank Filter Bag