Magnetic Viewing Film - Magnetic Field Display Film 12" x 12" - COOL ! Film Size: 12" long x 12" 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