This stainless steel filter fits into the Inline Beer Filtration System (10") so it can be used as a hop randall. It is made of a 300 micron stainless steel screen. This filter is is perfect for packing the filtration system with leaf hops to add hop oils before serving the beer. It can also be used to add other flavor additions such as vanilla beans or fruit. The gaskets on either end are made of BUNA-N.