Where Durability Meets DesignStronger but smaller than other brands, easy to fixed in the narrow metallic surface. 16mm x 12mm, 12 Pcs in package. Each powerful magnet holds up to 20 sheets of paper on any metallic surface.[NOT suitable for glass magnetic board ] Strong Fridge MagnetSuitable as jewelry hangers, hardware or garage tools hangers, key holders, or kitchen utensils organizer. Perfect for holding printer paper, photos, posters, cards on whiteboards, fridges, bulletin boards, magnetic maps, calendars, lockers, file cabinets, and other magnetic surfaces. Designed to AttachPush pin shape design for magnetic-absorbing force, high strength glue. whiteboard magnets will not leave any dirt on your refrigerator, bulletin board or maps, easily attach or remove. All in One Shape Made of neodymium material, 3-layer (Nickel + Copper + Nickel) Triple-coated and heavy duty industrial grade magnets make you easy to grasp and attach on your whiteboard. Customer ServiceWe promise an excellent customer experience.Please do not hesitate to contact us.