Re: Filter ???
A machined lump of non ferrous metal of that size may have a useful scrap value if weighed in "clean" with any odd metal bits and pieces removed!
Copper about £3/kg, brass about £2-50/kg and aluminium about 50p/kg.
__________________
....__________
....|____||__|__\_____
.=.| _---\__|__|_---_|.
.........O..Chris....O
|