Magnetic poster hangers with powerful magnets, strong enough to hang any kingds of prints, maps, posters and even tapestry Wide Compatibility: the 40 inch magnetic poster hanger can be used for any 40" wide poster in spite of any length, such as 40x27 40x30 40x60 Changable & Damage Free: change up your posters from time to time in a minute, really easy operation Kindly Note: a big thickness of your poster may affect the magnets, so it might not be for thick poster or canvas