Italian Marble Magnet sized 2 in. x 2 in. "The Last World Trade Center Beam." The Beam is now on display in the 9/11 Memorial and Museum. The most unique magnet you will ever own, each heavy piece has a strong magnet affixed to the back of 1/2-inch thick Botticino marble featuring high-def historical images from the Museum collection. True collector's pieces. Image by Official Ground Zero Photographer Gary Suson.