Neodymium Iron Boron N52 Magnet Block Super Strong Rectangle Rare Earth NIB 5pcsA neodymium magnet (also known as NdFeB, NIB or Neo magnet), the most widely used type of rare-earth magnet, is a permanent magnetNeodymium (chemical symbol Nd) is element 60 on the periodic table. It is a rare earth metal and forms one of the Lanthanides series. When added to Iron (Fe) and Boron (B) (chemical formula Nd14Fe21B) the resultant magnets are the strongest magnets currently available.Neodymium magnets are sometimes known as Neo, Neod or NIB magnets.usually coated Nickel plating to prevent the iron from rusting.Specification: measurements units: mm / inchShape : RectangleGrade : N52Pole N/S : AxiallyPull Force (magnet to steel plate) : 18.82lb / 7.17kgPlating: Ni-Cu-Ni ( Nickel )Operating temperature: ≤80℃Material: NdFeB (neodymium, iron and boron)Nd2Fe14B tetragonal crystalline structureColor: SilverSize : Magnetic face: L: 40mm / 1,57" / 1-37/64 inchW: 10mm / 0,39" / 25/64 inchThickness: 4mm / 0,15" / 5/32 inch WARNING: These magnets are very powerful which should be handled with great care, it is very easy them broke if collision.Be careful fragile and clip hand, placed in a dry place, stored at room temperature!This is a seriously powerful magnet and it is totally unsuitable for children!Please be carefull when break apart because Neodymium block magnet have strong Magnetism.Care should be used when handling two magnets as they can pull together with such force that pieces of the magnets cansplinter off and cause injury.Keep the magnets away from pacemakers and magnetic storage devices such as mobilephones, bank cards and computers. Package Included: 5pcs x Neodymium Iron Boron N52 Magnet Block Super Strong Rectangle Rare Earth NIB Check out our other items! Check out our Hown Store Click here, Subscribe to this seller's newsletter, and you'll also follow them for featured items and special offers Shipping Policies:We ship to the Lower 48 States only (Does NOT include Hawaii or Alaska)We cannot ship to PO Boxes/APO'sWe cannot combine shipping.No Local Pickup. All items will be shipped directly to you from our warehouses within 1-3 business days. Most items are delivered within 3-5 business days, however, please allow 3-9 business days. All items are in stock when they are listed. Inventory is tracked and updated regularly. However, if demand exceeds our supply, we will give the customer the following options: Full refund. Have the item back ordered and shipped when it becomes available. We will offer other items in similar style and quality. Your buy / purchase of the item implies you agree to this policy. If you have a question about a product not otherwise answered in the item description, please contact us via eCRATER messages first and allow us the opportunity to help you and be sure we have what you're looking for. Exchange/Return Policy:Your satisfaction is guaranteed! If for any reason you are unhappy with your item, just return it within 30 days for a full refund, minus shipping cost. Please contact us prior to initiating a return so that we can issue you a refund authorization.We accept returns under the condition that it does not open the packaging has not been damaged merchandise.We have money back warranty program and after sale service.Payment PolicyWe require Immediate Payment. Must be an authorized address.