Made of material, the magnetic rubber strip is and useful. One side is black with magnetic, one side is nonmark glue. You just peel the back protective paper and place your photo. It is perfect for making homemade fridge magnets or decorations for school lockers, whiteboard, metal desks, etc.Feature ColorBlack Material: Rubber. Size: About 29.7 x 0.08 cm. Made of , and practical for long term use. One side is black with magnetic, one side is nonmark glue. Suitable temperature: maximum 80 degrees, room temperature preservation not high temperature. Rubber backing is magnetic, flexible and reelable, but not foldable. The back is made of rubber magnets, which can be used directly on refrigerators with iron or other surfaces with iron.Package list: 5 x Magnetic Rubber