Size:Dia. 6mm x Height 3mm Quantity: 40 piece Coating: Nickel (Ni) Plated (silver-like shine) - Anti Corrosion These magnets are perfect at work for sticking receipts, tasks, papers or instructions against a magnetic board or at home for hanging kids art work or family photos against the fridge. Ideal for model building, for crafting, experimentation and fixtures of all kinds Please be attention The whiteboard / fridge magnets should made from neodymium magnet and acrylic Warranty: If you are unhappy in any way, please contact us! (Please note these magnets are not a toy and can cause serious damage)