A three-dimensional corner lap joint preform and a method of forming a three-dimensional corner lap joint preform including a woven flange with one or more legs that extend from the flange. The face has a plurality of circumferentially spaced pairs of poles that concentrate the magnetic strength of the magnet on the face and form magnetic loops in the filter housing to cause any ferrous metal particles in the fluid being circulated through the filter housing to be trapped against interior walls of the filter housing. Properties of the human visual perception are e.