Magnetic Viewing Film - Magnetic Field Display Film 3" x 3" - COOL ! Film Size: 3" long x 3" wide Visually see the patterns of magnetic field Fun experiments and Greate Education Material !!! made from a plastic film that contains a ferromagnetic slurry of fine nickel particles that align themselves along magnetic field lines Film can be easely cut with scisors and knifes. Sold by Applied Magnets