Finest Filters Long Felt Filter Sock with 4" Welded Ring 100 Micron Rating

Finest-Filters Mechanical Filter Socks are ideal for removing waste particles from the aquarium water column This filter sock is made from high quality filter felt and is 14" in length This filter sock has a 4 inch welded plastic ring in the rim This filter sock will remove particles down to 100 microns (0.1mm) Filter Socks can be rinsed and reused many times - giving a cost effective filtration solution.