The Greenwood Double Door Filter Box is an in line magnetic separator used within vertical gravity feed chutes for the extraction of ferrous metals from materials being processed. The product is diverted by the angle deflectors onto the powerful central magnetic deflector and the magnetic side doors. Hence the clean product flows through the box and any ferrous contamination is held by the central deflector and doors. These quick release doors also provide easy access inside the box for cleaning. As a solely contained unit, it is very adaptable, and is ideal for products which do not flow particularly easily and may have a tendency to bridge. The stainless steel housing is flanged for fitting into process chute work. Square to round adaptors can be made to suit round pipes.