4" Long Felt Filter Sock
You are purchasing a high quality, UK manufactured filter sock.
We are recommending these for use in aquariums, as a mechanical filter, but they can also be used in many other applications.
This filter sock is made from extremely high quality felt, and can simply be rinsed and reused many times, by turning inside out and spraying with a hose. These filter socks are very durable, and will last being cleaned hundreds of times.
These filter socks provide crystal clear water, and have a high quality 4" Welded ring, which does not contain any chemicals, and is totally suitable for use with aquariums.
The ring contains a handle for easy removal and cleaning. This can be used on entry to a sump tank.