ALEGI Aquarium Filter Socks 4 inch by 14 Inch Long, 200 Micron - 4 Inch Ring Aquarium Felt Filter Bags (4 by 14 Inch - 10Pack)Brand: ALEGI Color: White Features: Suitable for purification of planted aquarium tank , sea water tank aquaculture and ornamental fish tank. Solid construction and heavy duty stitching make these socks strong and durable so they can be cleaned and reused numerous times. Able to keep impurities trapped in the filter bag. Reduces Noise And Splash in your aquarium pond overflow sump system You will receive 10 pack 4 inch filter socks. model number: