Comes with holder and 1 x micron filter bag.

This is the large 7inch/180mm version.

Suitable for placing carbon/Po4 remover/Or help to remove floating particles/waste in your tank.

How to use:
Hang the holder on the side of your sump
Place the bag into the holder
Place the filter media (Carbon/Po4 Remover) of your choice into the bag Put the holder close to a high flow area like your overflow pipe. (Would also depends on what type of media)