The Hang-On Filtersock Mount. The set includes 2 adaptors, one for the 10cm (4 inch) filtersock and one for the 18cm (7 inch) filtersock. I't's very easy to install and very easy to take out when needed to change a filtersock. The set will hang on mount up to 2,5 cm (1 inch) wide.
Filtersocks remove excess food, detritus, organic waste, dust, and other particulates. Filtersocks also help prevent larger objects, such as sand, crabs, snails, etc. from damaging pump motors and result in CRYSTAL CLEAR WATER