The invention is directed broadly to a filter for a bin storing agricultural material, the filter comprising; a rigid perimeter frame supporting a grate within the frame; and a plurality of legs spaced about the perimeter frame, wherein the filter, in use, is located within the bin and positioned to substantially cover an outlet of the bin, the plurality of legs in direct contact with the bin so as to transmit vibrations from the bin to the filter, the agricultural material within the bin traversing the grate as it exits the bin.