Poly ring filter socks are essential components for maintaining a clean and healthy saltwater aquarium environment. These high-quality felt socks come in two sizes: 4-inch diameter by 14 inches and 7-inch diameter with lengths of either 16 or 32 inches, making them suitable for various filtration needs. They feature double-stitched construction, ensuring durability and long-lasting performance. Available in both 100 and 200 micron pore sizes, these socks effectively capture debris and particles while allowing water to flow through smoothly. This product is ideal for saltwater aquarium enthusiasts who require reliable filter media to maintain pristine water conditions.