【Excellent Quality】 - These magnets are "Rare Earth" magnets. The magnet housing has a triple-layer coating (nickel-copper) that protects the magnets from corrosion and breakage. 【Super Strength】 - Strong Magnetic Force - Each magnet can easily hold 18 sheets of A4 paper, photos, pictures, or notes. (Depending on the smooth surface of the adsorbed metal) 【Application】 - The powerful magnets can be used for various metal and magnetic surfaces such as refrigerator doors, whiteboards, magnetic bulletin boards, glass boards, metal shelves, etc. Dimensions: The round magnets have a diameter of 15 mm and a height of 3 mm. Silver chrome finish. Wide Range of Applications: Refrigerator magnets, decorations, magnetic whiteboards, magnetic cable extensions, technical applications, hobbies and crafts, for DIY; Kitchen, office, model making, workshop, noticeboard.