<p>Optimal Filtration: Our 12 pack of 4 inch filter socks features a honeycomb design, ensuring effective removal of organic matter and debris in aquariums, promoting a healthier aquatic environment.</p> <p>Perfect Size: Each honeycomb filter sock measures approximately 9.8 inches in length and 4 inches in caliber, with a 150-micron rating perfectly accommodating a variety of filtration systems while ensuring maximum filtration efficiency.</p> <p>Lasting Construction: Made with woven mesh materials, these ring honeycomb filter socks are built to withstand the rigors of aquarium use, preventing damage to aquarium equipment from particles like sand and coral.</p> <p>Versatile Use: These filter socks are essential aquarium filter bags that cater to both saltwater and freshwater fish tanks, making them a versatile addition to your aquarium maintenance toolkit.</p> <p>Color: White</p> <p>Material: Polyester</p> <p>Package Contents:</p> <p>12 Pack x 4 Inch Filter Sock</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>